116da78b7SThomas Gleixner // SPDX-License-Identifier: GPL-2.0-only
27ac9a364SKalle Valo /******************************************************************************
37ac9a364SKalle Valo *
47ac9a364SKalle Valo * Copyright(c) 2005 - 2011 Intel Corporation. All rights reserved.
57ac9a364SKalle Valo *
67ac9a364SKalle Valo * Contact Information:
77ac9a364SKalle Valo * Intel Linux Wireless <ilw@linux.intel.com>
87ac9a364SKalle Valo * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
97ac9a364SKalle Valo *
107ac9a364SKalle Valo *****************************************************************************/
117ac9a364SKalle Valo #include <linux/kernel.h>
127ac9a364SKalle Valo #include <linux/skbuff.h>
137ac9a364SKalle Valo #include <linux/slab.h>
147ac9a364SKalle Valo #include <net/mac80211.h>
157ac9a364SKalle Valo
167ac9a364SKalle Valo #include <linux/netdevice.h>
177ac9a364SKalle Valo #include <linux/etherdevice.h>
187ac9a364SKalle Valo #include <linux/delay.h>
197ac9a364SKalle Valo
207ac9a364SKalle Valo #include <linux/workqueue.h>
217ac9a364SKalle Valo
227ac9a364SKalle Valo #include "common.h"
237ac9a364SKalle Valo #include "4965.h"
247ac9a364SKalle Valo
257ac9a364SKalle Valo #define IL4965_RS_NAME "iwl-4965-rs"
267ac9a364SKalle Valo
277ac9a364SKalle Valo #define NUM_TRY_BEFORE_ANT_TOGGLE 1
287ac9a364SKalle Valo #define IL_NUMBER_TRY 1
297ac9a364SKalle Valo #define IL_HT_NUMBER_TRY 3
307ac9a364SKalle Valo
317ac9a364SKalle Valo #define RATE_MAX_WINDOW 62 /* # tx in history win */
327ac9a364SKalle Valo #define RATE_MIN_FAILURE_TH 6 /* min failures to calc tpt */
337ac9a364SKalle Valo #define RATE_MIN_SUCCESS_TH 8 /* min successes to calc tpt */
347ac9a364SKalle Valo
357ac9a364SKalle Valo /* max allowed rate miss before sync LQ cmd */
367ac9a364SKalle Valo #define IL_MISSED_RATE_MAX 15
377ac9a364SKalle Valo /* max time to accum history 2 seconds */
387ac9a364SKalle Valo #define RATE_SCALE_FLUSH_INTVL (3*HZ)
397ac9a364SKalle Valo
407ac9a364SKalle Valo static u8 rs_ht_to_legacy[] = {
417ac9a364SKalle Valo RATE_6M_IDX, RATE_6M_IDX,
427ac9a364SKalle Valo RATE_6M_IDX, RATE_6M_IDX,
437ac9a364SKalle Valo RATE_6M_IDX,
447ac9a364SKalle Valo RATE_6M_IDX, RATE_9M_IDX,
457ac9a364SKalle Valo RATE_12M_IDX, RATE_18M_IDX,
467ac9a364SKalle Valo RATE_24M_IDX, RATE_36M_IDX,
477ac9a364SKalle Valo RATE_48M_IDX, RATE_54M_IDX
487ac9a364SKalle Valo };
497ac9a364SKalle Valo
507ac9a364SKalle Valo static const u8 ant_toggle_lookup[] = {
517ac9a364SKalle Valo /*ANT_NONE -> */ ANT_NONE,
527ac9a364SKalle Valo /*ANT_A -> */ ANT_B,
537ac9a364SKalle Valo /*ANT_B -> */ ANT_C,
547ac9a364SKalle Valo /*ANT_AB -> */ ANT_BC,
557ac9a364SKalle Valo /*ANT_C -> */ ANT_A,
567ac9a364SKalle Valo /*ANT_AC -> */ ANT_AB,
577ac9a364SKalle Valo /*ANT_BC -> */ ANT_AC,
587ac9a364SKalle Valo /*ANT_ABC -> */ ANT_ABC,
597ac9a364SKalle Valo };
607ac9a364SKalle Valo
617ac9a364SKalle Valo #define IL_DECLARE_RATE_INFO(r, s, ip, in, rp, rn, pp, np) \
627ac9a364SKalle Valo [RATE_##r##M_IDX] = { RATE_##r##M_PLCP, \
637ac9a364SKalle Valo RATE_SISO_##s##M_PLCP, \
647ac9a364SKalle Valo RATE_MIMO2_##s##M_PLCP,\
657ac9a364SKalle Valo RATE_##r##M_IEEE, \
667ac9a364SKalle Valo RATE_##ip##M_IDX, \
677ac9a364SKalle Valo RATE_##in##M_IDX, \
687ac9a364SKalle Valo RATE_##rp##M_IDX, \
697ac9a364SKalle Valo RATE_##rn##M_IDX, \
707ac9a364SKalle Valo RATE_##pp##M_IDX, \
717ac9a364SKalle Valo RATE_##np##M_IDX }
727ac9a364SKalle Valo
737ac9a364SKalle Valo /*
747ac9a364SKalle Valo * Parameter order:
757ac9a364SKalle Valo * rate, ht rate, prev rate, next rate, prev tgg rate, next tgg rate
767ac9a364SKalle Valo *
777ac9a364SKalle Valo * If there isn't a valid next or previous rate then INV is used which
787ac9a364SKalle Valo * maps to RATE_INVALID
797ac9a364SKalle Valo *
807ac9a364SKalle Valo */
817ac9a364SKalle Valo const struct il_rate_info il_rates[RATE_COUNT] = {
827ac9a364SKalle Valo IL_DECLARE_RATE_INFO(1, INV, INV, 2, INV, 2, INV, 2), /* 1mbps */
837ac9a364SKalle Valo IL_DECLARE_RATE_INFO(2, INV, 1, 5, 1, 5, 1, 5), /* 2mbps */
847ac9a364SKalle Valo IL_DECLARE_RATE_INFO(5, INV, 2, 6, 2, 11, 2, 11), /*5.5mbps */
857ac9a364SKalle Valo IL_DECLARE_RATE_INFO(11, INV, 9, 12, 9, 12, 5, 18), /* 11mbps */
867ac9a364SKalle Valo IL_DECLARE_RATE_INFO(6, 6, 5, 9, 5, 11, 5, 11), /* 6mbps */
877ac9a364SKalle Valo IL_DECLARE_RATE_INFO(9, 6, 6, 11, 6, 11, 5, 11), /* 9mbps */
887ac9a364SKalle Valo IL_DECLARE_RATE_INFO(12, 12, 11, 18, 11, 18, 11, 18), /* 12mbps */
897ac9a364SKalle Valo IL_DECLARE_RATE_INFO(18, 18, 12, 24, 12, 24, 11, 24), /* 18mbps */
907ac9a364SKalle Valo IL_DECLARE_RATE_INFO(24, 24, 18, 36, 18, 36, 18, 36), /* 24mbps */
917ac9a364SKalle Valo IL_DECLARE_RATE_INFO(36, 36, 24, 48, 24, 48, 24, 48), /* 36mbps */
927ac9a364SKalle Valo IL_DECLARE_RATE_INFO(48, 48, 36, 54, 36, 54, 36, 54), /* 48mbps */
937ac9a364SKalle Valo IL_DECLARE_RATE_INFO(54, 54, 48, INV, 48, INV, 48, INV),/* 54mbps */
947ac9a364SKalle Valo IL_DECLARE_RATE_INFO(60, 60, 48, INV, 48, INV, 48, INV),/* 60mbps */
957ac9a364SKalle Valo };
967ac9a364SKalle Valo
977ac9a364SKalle Valo static int
il4965_hwrate_to_plcp_idx(u32 rate_n_flags)987ac9a364SKalle Valo il4965_hwrate_to_plcp_idx(u32 rate_n_flags)
997ac9a364SKalle Valo {
1007ac9a364SKalle Valo int idx = 0;
1017ac9a364SKalle Valo
1027ac9a364SKalle Valo /* HT rate format */
1037ac9a364SKalle Valo if (rate_n_flags & RATE_MCS_HT_MSK) {
1047ac9a364SKalle Valo idx = (rate_n_flags & 0xff);
1057ac9a364SKalle Valo
1067ac9a364SKalle Valo if (idx >= RATE_MIMO2_6M_PLCP)
1077ac9a364SKalle Valo idx = idx - RATE_MIMO2_6M_PLCP;
1087ac9a364SKalle Valo
1097ac9a364SKalle Valo idx += IL_FIRST_OFDM_RATE;
1107ac9a364SKalle Valo /* skip 9M not supported in ht */
1117ac9a364SKalle Valo if (idx >= RATE_9M_IDX)
1127ac9a364SKalle Valo idx += 1;
1137ac9a364SKalle Valo if (idx >= IL_FIRST_OFDM_RATE && idx <= IL_LAST_OFDM_RATE)
1147ac9a364SKalle Valo return idx;
1157ac9a364SKalle Valo
1167ac9a364SKalle Valo /* legacy rate format, search for match in table */
1177ac9a364SKalle Valo } else {
1187ac9a364SKalle Valo for (idx = 0; idx < ARRAY_SIZE(il_rates); idx++)
1197ac9a364SKalle Valo if (il_rates[idx].plcp == (rate_n_flags & 0xFF))
1207ac9a364SKalle Valo return idx;
1217ac9a364SKalle Valo }
1227ac9a364SKalle Valo
1237ac9a364SKalle Valo return -1;
1247ac9a364SKalle Valo }
1257ac9a364SKalle Valo
1267ac9a364SKalle Valo static void il4965_rs_rate_scale_perform(struct il_priv *il,
1277ac9a364SKalle Valo struct sk_buff *skb,
1287ac9a364SKalle Valo struct ieee80211_sta *sta,
1297ac9a364SKalle Valo struct il_lq_sta *lq_sta);
1307ac9a364SKalle Valo static void il4965_rs_fill_link_cmd(struct il_priv *il,
1317ac9a364SKalle Valo struct il_lq_sta *lq_sta, u32 rate_n_flags);
1327ac9a364SKalle Valo static void il4965_rs_stay_in_table(struct il_lq_sta *lq_sta,
1337ac9a364SKalle Valo bool force_search);
1347ac9a364SKalle Valo
1357ac9a364SKalle Valo #ifdef CONFIG_MAC80211_DEBUGFS
1367ac9a364SKalle Valo static void il4965_rs_dbgfs_set_mcs(struct il_lq_sta *lq_sta,
1377ac9a364SKalle Valo u32 *rate_n_flags, int idx);
1387ac9a364SKalle Valo #else
1397ac9a364SKalle Valo static void
il4965_rs_dbgfs_set_mcs(struct il_lq_sta * lq_sta,u32 * rate_n_flags,int idx)1407ac9a364SKalle Valo il4965_rs_dbgfs_set_mcs(struct il_lq_sta *lq_sta, u32 * rate_n_flags, int idx)
1417ac9a364SKalle Valo {
1427ac9a364SKalle Valo }
1437ac9a364SKalle Valo #endif
1447ac9a364SKalle Valo
1453ecf6a3dSLee Jones /*
1467ac9a364SKalle Valo * The following tables contain the expected throughput metrics for all rates
1477ac9a364SKalle Valo *
1487ac9a364SKalle Valo * 1, 2, 5.5, 11, 6, 9, 12, 18, 24, 36, 48, 54, 60 MBits
1497ac9a364SKalle Valo *
1507ac9a364SKalle Valo * where invalid entries are zeros.
1517ac9a364SKalle Valo *
1527ac9a364SKalle Valo * CCK rates are only valid in legacy table and will only be used in G
1537ac9a364SKalle Valo * (2.4 GHz) band.
1547ac9a364SKalle Valo */
1557ac9a364SKalle Valo
1567ac9a364SKalle Valo static s32 expected_tpt_legacy[RATE_COUNT] = {
1577ac9a364SKalle Valo 7, 13, 35, 58, 40, 57, 72, 98, 121, 154, 177, 186, 0
1587ac9a364SKalle Valo };
1597ac9a364SKalle Valo
1607ac9a364SKalle Valo static s32 expected_tpt_siso20MHz[4][RATE_COUNT] = {
1617ac9a364SKalle Valo {0, 0, 0, 0, 42, 0, 76, 102, 124, 158, 183, 193, 202}, /* Norm */
1627ac9a364SKalle Valo {0, 0, 0, 0, 46, 0, 82, 110, 132, 167, 192, 202, 210}, /* SGI */
1637ac9a364SKalle Valo {0, 0, 0, 0, 48, 0, 93, 135, 176, 251, 319, 351, 381}, /* AGG */
1647ac9a364SKalle Valo {0, 0, 0, 0, 53, 0, 102, 149, 193, 275, 348, 381, 413}, /* AGG+SGI */
1657ac9a364SKalle Valo };
1667ac9a364SKalle Valo
1677ac9a364SKalle Valo static s32 expected_tpt_siso40MHz[4][RATE_COUNT] = {
1687ac9a364SKalle Valo {0, 0, 0, 0, 77, 0, 127, 160, 184, 220, 242, 250, 257}, /* Norm */
1697ac9a364SKalle Valo {0, 0, 0, 0, 83, 0, 135, 169, 193, 229, 250, 257, 264}, /* SGI */
1707ac9a364SKalle Valo {0, 0, 0, 0, 96, 0, 182, 259, 328, 451, 553, 598, 640}, /* AGG */
1717ac9a364SKalle Valo {0, 0, 0, 0, 106, 0, 199, 282, 357, 487, 593, 640, 683}, /* AGG+SGI */
1727ac9a364SKalle Valo };
1737ac9a364SKalle Valo
1747ac9a364SKalle Valo static s32 expected_tpt_mimo2_20MHz[4][RATE_COUNT] = {
1757ac9a364SKalle Valo {0, 0, 0, 0, 74, 0, 123, 155, 179, 213, 235, 243, 250}, /* Norm */
1767ac9a364SKalle Valo {0, 0, 0, 0, 81, 0, 131, 164, 187, 221, 242, 250, 256}, /* SGI */
1777ac9a364SKalle Valo {0, 0, 0, 0, 92, 0, 175, 250, 317, 436, 534, 578, 619}, /* AGG */
1787ac9a364SKalle Valo {0, 0, 0, 0, 102, 0, 192, 273, 344, 470, 573, 619, 660}, /* AGG+SGI */
1797ac9a364SKalle Valo };
1807ac9a364SKalle Valo
1817ac9a364SKalle Valo static s32 expected_tpt_mimo2_40MHz[4][RATE_COUNT] = {
1827ac9a364SKalle Valo {0, 0, 0, 0, 123, 0, 182, 214, 235, 264, 279, 285, 289}, /* Norm */
1837ac9a364SKalle Valo {0, 0, 0, 0, 131, 0, 191, 222, 242, 270, 284, 289, 293}, /* SGI */
1847ac9a364SKalle Valo {0, 0, 0, 0, 180, 0, 327, 446, 545, 708, 828, 878, 922}, /* AGG */
1857ac9a364SKalle Valo {0, 0, 0, 0, 197, 0, 355, 481, 584, 752, 872, 922, 966}, /* AGG+SGI */
1867ac9a364SKalle Valo };
1877ac9a364SKalle Valo
1887ac9a364SKalle Valo /* mbps, mcs */
1897ac9a364SKalle Valo static const struct il_rate_mcs_info il_rate_mcs[RATE_COUNT] = {
1907ac9a364SKalle Valo {"1", "BPSK DSSS"},
1917ac9a364SKalle Valo {"2", "QPSK DSSS"},
1927ac9a364SKalle Valo {"5.5", "BPSK CCK"},
1937ac9a364SKalle Valo {"11", "QPSK CCK"},
1947ac9a364SKalle Valo {"6", "BPSK 1/2"},
1957ac9a364SKalle Valo {"9", "BPSK 1/2"},
1967ac9a364SKalle Valo {"12", "QPSK 1/2"},
1977ac9a364SKalle Valo {"18", "QPSK 3/4"},
1987ac9a364SKalle Valo {"24", "16QAM 1/2"},
1997ac9a364SKalle Valo {"36", "16QAM 3/4"},
2007ac9a364SKalle Valo {"48", "64QAM 2/3"},
2017ac9a364SKalle Valo {"54", "64QAM 3/4"},
2027ac9a364SKalle Valo {"60", "64QAM 5/6"},
2037ac9a364SKalle Valo };
2047ac9a364SKalle Valo
2057ac9a364SKalle Valo #define MCS_IDX_PER_STREAM (8)
2067ac9a364SKalle Valo
2077ac9a364SKalle Valo static inline u8
il4965_rs_extract_rate(u32 rate_n_flags)2087ac9a364SKalle Valo il4965_rs_extract_rate(u32 rate_n_flags)
2097ac9a364SKalle Valo {
2107ac9a364SKalle Valo return (u8) (rate_n_flags & 0xFF);
2117ac9a364SKalle Valo }
2127ac9a364SKalle Valo
2137ac9a364SKalle Valo static void
il4965_rs_rate_scale_clear_win(struct il_rate_scale_data * win)2147ac9a364SKalle Valo il4965_rs_rate_scale_clear_win(struct il_rate_scale_data *win)
2157ac9a364SKalle Valo {
2167ac9a364SKalle Valo win->data = 0;
2177ac9a364SKalle Valo win->success_counter = 0;
2187ac9a364SKalle Valo win->success_ratio = IL_INVALID_VALUE;
2197ac9a364SKalle Valo win->counter = 0;
2207ac9a364SKalle Valo win->average_tpt = IL_INVALID_VALUE;
2217ac9a364SKalle Valo win->stamp = 0;
2227ac9a364SKalle Valo }
2237ac9a364SKalle Valo
2247ac9a364SKalle Valo static inline u8
il4965_rs_is_valid_ant(u8 valid_antenna,u8 ant_type)2257ac9a364SKalle Valo il4965_rs_is_valid_ant(u8 valid_antenna, u8 ant_type)
2267ac9a364SKalle Valo {
2277ac9a364SKalle Valo return (ant_type & valid_antenna) == ant_type;
2287ac9a364SKalle Valo }
2297ac9a364SKalle Valo
2307ac9a364SKalle Valo /*
2317ac9a364SKalle Valo * removes the old data from the stats. All data that is older than
2327ac9a364SKalle Valo * TID_MAX_TIME_DIFF, will be deleted.
2337ac9a364SKalle Valo */
2347ac9a364SKalle Valo static void
il4965_rs_tl_rm_old_stats(struct il_traffic_load * tl,u32 curr_time)2357ac9a364SKalle Valo il4965_rs_tl_rm_old_stats(struct il_traffic_load *tl, u32 curr_time)
2367ac9a364SKalle Valo {
2377ac9a364SKalle Valo /* The oldest age we want to keep */
2387ac9a364SKalle Valo u32 oldest_time = curr_time - TID_MAX_TIME_DIFF;
2397ac9a364SKalle Valo
2407ac9a364SKalle Valo while (tl->queue_count && tl->time_stamp < oldest_time) {
2417ac9a364SKalle Valo tl->total -= tl->packet_count[tl->head];
2427ac9a364SKalle Valo tl->packet_count[tl->head] = 0;
2437ac9a364SKalle Valo tl->time_stamp += TID_QUEUE_CELL_SPACING;
2447ac9a364SKalle Valo tl->queue_count--;
2457ac9a364SKalle Valo tl->head++;
2467ac9a364SKalle Valo if (tl->head >= TID_QUEUE_MAX_SIZE)
2477ac9a364SKalle Valo tl->head = 0;
2487ac9a364SKalle Valo }
2497ac9a364SKalle Valo }
2507ac9a364SKalle Valo
2517ac9a364SKalle Valo /*
2527ac9a364SKalle Valo * increment traffic load value for tid and also remove
2537ac9a364SKalle Valo * any old values if passed the certain time period
2547ac9a364SKalle Valo */
2557ac9a364SKalle Valo static u8
il4965_rs_tl_add_packet(struct il_lq_sta * lq_data,struct ieee80211_hdr * hdr)2567ac9a364SKalle Valo il4965_rs_tl_add_packet(struct il_lq_sta *lq_data, struct ieee80211_hdr *hdr)
2577ac9a364SKalle Valo {
2587ac9a364SKalle Valo u32 curr_time = jiffies_to_msecs(jiffies);
2597ac9a364SKalle Valo u32 time_diff;
2607ac9a364SKalle Valo s32 idx;
2617ac9a364SKalle Valo struct il_traffic_load *tl = NULL;
2627ac9a364SKalle Valo u8 tid;
2637ac9a364SKalle Valo
2647ac9a364SKalle Valo if (ieee80211_is_data_qos(hdr->frame_control)) {
2657ac9a364SKalle Valo u8 *qc = ieee80211_get_qos_ctl(hdr);
2667ac9a364SKalle Valo tid = qc[0] & 0xf;
2677ac9a364SKalle Valo } else
2687ac9a364SKalle Valo return MAX_TID_COUNT;
2697ac9a364SKalle Valo
2707ac9a364SKalle Valo if (unlikely(tid >= TID_MAX_LOAD_COUNT))
2717ac9a364SKalle Valo return MAX_TID_COUNT;
2727ac9a364SKalle Valo
2737ac9a364SKalle Valo tl = &lq_data->load[tid];
2747ac9a364SKalle Valo
2757ac9a364SKalle Valo curr_time -= curr_time % TID_ROUND_VALUE;
2767ac9a364SKalle Valo
2777ac9a364SKalle Valo /* Happens only for the first packet. Initialize the data */
2787ac9a364SKalle Valo if (!(tl->queue_count)) {
2797ac9a364SKalle Valo tl->total = 1;
2807ac9a364SKalle Valo tl->time_stamp = curr_time;
2817ac9a364SKalle Valo tl->queue_count = 1;
2827ac9a364SKalle Valo tl->head = 0;
2837ac9a364SKalle Valo tl->packet_count[0] = 1;
2847ac9a364SKalle Valo return MAX_TID_COUNT;
2857ac9a364SKalle Valo }
2867ac9a364SKalle Valo
2877ac9a364SKalle Valo time_diff = TIME_WRAP_AROUND(tl->time_stamp, curr_time);
2887ac9a364SKalle Valo idx = time_diff / TID_QUEUE_CELL_SPACING;
2897ac9a364SKalle Valo
2907ac9a364SKalle Valo /* The history is too long: remove data that is older than */
2917ac9a364SKalle Valo /* TID_MAX_TIME_DIFF */
2927ac9a364SKalle Valo if (idx >= TID_QUEUE_MAX_SIZE)
2937ac9a364SKalle Valo il4965_rs_tl_rm_old_stats(tl, curr_time);
2947ac9a364SKalle Valo
2957ac9a364SKalle Valo idx = (tl->head + idx) % TID_QUEUE_MAX_SIZE;
2967ac9a364SKalle Valo tl->packet_count[idx] = tl->packet_count[idx] + 1;
2977ac9a364SKalle Valo tl->total = tl->total + 1;
2987ac9a364SKalle Valo
2997ac9a364SKalle Valo if ((idx + 1) > tl->queue_count)
3007ac9a364SKalle Valo tl->queue_count = idx + 1;
3017ac9a364SKalle Valo
3027ac9a364SKalle Valo return tid;
3037ac9a364SKalle Valo }
3047ac9a364SKalle Valo
3057ac9a364SKalle Valo /*
3067ac9a364SKalle Valo get the traffic load value for tid
3077ac9a364SKalle Valo */
3087ac9a364SKalle Valo static u32
il4965_rs_tl_get_load(struct il_lq_sta * lq_data,u8 tid)3097ac9a364SKalle Valo il4965_rs_tl_get_load(struct il_lq_sta *lq_data, u8 tid)
3107ac9a364SKalle Valo {
3117ac9a364SKalle Valo u32 curr_time = jiffies_to_msecs(jiffies);
3127ac9a364SKalle Valo u32 time_diff;
3137ac9a364SKalle Valo s32 idx;
3147ac9a364SKalle Valo struct il_traffic_load *tl = NULL;
3157ac9a364SKalle Valo
3167ac9a364SKalle Valo if (tid >= TID_MAX_LOAD_COUNT)
3177ac9a364SKalle Valo return 0;
3187ac9a364SKalle Valo
3197ac9a364SKalle Valo tl = &(lq_data->load[tid]);
3207ac9a364SKalle Valo
3217ac9a364SKalle Valo curr_time -= curr_time % TID_ROUND_VALUE;
3227ac9a364SKalle Valo
3237ac9a364SKalle Valo if (!(tl->queue_count))
3247ac9a364SKalle Valo return 0;
3257ac9a364SKalle Valo
3267ac9a364SKalle Valo time_diff = TIME_WRAP_AROUND(tl->time_stamp, curr_time);
3277ac9a364SKalle Valo idx = time_diff / TID_QUEUE_CELL_SPACING;
3287ac9a364SKalle Valo
3297ac9a364SKalle Valo /* The history is too long: remove data that is older than */
3307ac9a364SKalle Valo /* TID_MAX_TIME_DIFF */
3317ac9a364SKalle Valo if (idx >= TID_QUEUE_MAX_SIZE)
3327ac9a364SKalle Valo il4965_rs_tl_rm_old_stats(tl, curr_time);
3337ac9a364SKalle Valo
3347ac9a364SKalle Valo return tl->total;
3357ac9a364SKalle Valo }
3367ac9a364SKalle Valo
3377ac9a364SKalle Valo static int
il4965_rs_tl_turn_on_agg_for_tid(struct il_priv * il,struct il_lq_sta * lq_data,u8 tid,struct ieee80211_sta * sta)3387ac9a364SKalle Valo il4965_rs_tl_turn_on_agg_for_tid(struct il_priv *il, struct il_lq_sta *lq_data,
3397ac9a364SKalle Valo u8 tid, struct ieee80211_sta *sta)
3407ac9a364SKalle Valo {
3417ac9a364SKalle Valo int ret = -EAGAIN;
3427ac9a364SKalle Valo u32 load;
3437ac9a364SKalle Valo
3447ac9a364SKalle Valo load = il4965_rs_tl_get_load(lq_data, tid);
3457ac9a364SKalle Valo
3467ac9a364SKalle Valo if (load > IL_AGG_LOAD_THRESHOLD) {
3477ac9a364SKalle Valo D_HT("Starting Tx agg: STA: %pM tid: %d\n", sta->addr, tid);
3487ac9a364SKalle Valo ret = ieee80211_start_tx_ba_session(sta, tid, 5000);
3497ac9a364SKalle Valo if (ret == -EAGAIN) {
3507ac9a364SKalle Valo /*
3517ac9a364SKalle Valo * driver and mac80211 is out of sync
3527ac9a364SKalle Valo * this might be cause by reloading firmware
3537ac9a364SKalle Valo * stop the tx ba session here
3547ac9a364SKalle Valo */
3557ac9a364SKalle Valo IL_ERR("Fail start Tx agg on tid: %d\n", tid);
3567ac9a364SKalle Valo ieee80211_stop_tx_ba_session(sta, tid);
3577ac9a364SKalle Valo }
3587ac9a364SKalle Valo } else
3597ac9a364SKalle Valo D_HT("Aggregation not enabled for tid %d because load = %u\n",
3607ac9a364SKalle Valo tid, load);
3617ac9a364SKalle Valo
3627ac9a364SKalle Valo return ret;
3637ac9a364SKalle Valo }
3647ac9a364SKalle Valo
3657ac9a364SKalle Valo static void
il4965_rs_tl_turn_on_agg(struct il_priv * il,u8 tid,struct il_lq_sta * lq_data,struct ieee80211_sta * sta)3667ac9a364SKalle Valo il4965_rs_tl_turn_on_agg(struct il_priv *il, u8 tid, struct il_lq_sta *lq_data,
3677ac9a364SKalle Valo struct ieee80211_sta *sta)
3687ac9a364SKalle Valo {
3697ac9a364SKalle Valo if (tid < TID_MAX_LOAD_COUNT)
3707ac9a364SKalle Valo il4965_rs_tl_turn_on_agg_for_tid(il, lq_data, tid, sta);
3717ac9a364SKalle Valo else
3727ac9a364SKalle Valo IL_ERR("tid exceeds max load count: %d/%d\n", tid,
3737ac9a364SKalle Valo TID_MAX_LOAD_COUNT);
3747ac9a364SKalle Valo }
3757ac9a364SKalle Valo
3767ac9a364SKalle Valo static inline int
il4965_get_il4965_num_of_ant_from_rate(u32 rate_n_flags)3777ac9a364SKalle Valo il4965_get_il4965_num_of_ant_from_rate(u32 rate_n_flags)
3787ac9a364SKalle Valo {
3797ac9a364SKalle Valo return !!(rate_n_flags & RATE_MCS_ANT_A_MSK) +
3807ac9a364SKalle Valo !!(rate_n_flags & RATE_MCS_ANT_B_MSK) +
3817ac9a364SKalle Valo !!(rate_n_flags & RATE_MCS_ANT_C_MSK);
3827ac9a364SKalle Valo }
3837ac9a364SKalle Valo
3847ac9a364SKalle Valo /*
3857ac9a364SKalle Valo * Static function to get the expected throughput from an il_scale_tbl_info
3867ac9a364SKalle Valo * that wraps a NULL pointer check
3877ac9a364SKalle Valo */
3887ac9a364SKalle Valo static s32
il4965_get_expected_tpt(struct il_scale_tbl_info * tbl,int rs_idx)3897ac9a364SKalle Valo il4965_get_expected_tpt(struct il_scale_tbl_info *tbl, int rs_idx)
3907ac9a364SKalle Valo {
3917ac9a364SKalle Valo if (tbl->expected_tpt)
3927ac9a364SKalle Valo return tbl->expected_tpt[rs_idx];
3937ac9a364SKalle Valo return 0;
3947ac9a364SKalle Valo }
3957ac9a364SKalle Valo
3963ecf6a3dSLee Jones /*
3977ac9a364SKalle Valo * il4965_rs_collect_tx_data - Update the success/failure sliding win
3987ac9a364SKalle Valo *
3997ac9a364SKalle Valo * We keep a sliding win of the last 62 packets transmitted
4007ac9a364SKalle Valo * at this rate. win->data contains the bitmask of successful
4017ac9a364SKalle Valo * packets.
4027ac9a364SKalle Valo */
4037ac9a364SKalle Valo static int
il4965_rs_collect_tx_data(struct il_scale_tbl_info * tbl,int scale_idx,int attempts,int successes)4047ac9a364SKalle Valo il4965_rs_collect_tx_data(struct il_scale_tbl_info *tbl, int scale_idx,
4057ac9a364SKalle Valo int attempts, int successes)
4067ac9a364SKalle Valo {
4077ac9a364SKalle Valo struct il_rate_scale_data *win = NULL;
4087ac9a364SKalle Valo static const u64 mask = (((u64) 1) << (RATE_MAX_WINDOW - 1));
4097ac9a364SKalle Valo s32 fail_count, tpt;
4107ac9a364SKalle Valo
4117ac9a364SKalle Valo if (scale_idx < 0 || scale_idx >= RATE_COUNT)
4127ac9a364SKalle Valo return -EINVAL;
4137ac9a364SKalle Valo
4147ac9a364SKalle Valo /* Select win for current tx bit rate */
4157ac9a364SKalle Valo win = &(tbl->win[scale_idx]);
4167ac9a364SKalle Valo
4177ac9a364SKalle Valo /* Get expected throughput */
4187ac9a364SKalle Valo tpt = il4965_get_expected_tpt(tbl, scale_idx);
4197ac9a364SKalle Valo
4207ac9a364SKalle Valo /*
4217ac9a364SKalle Valo * Keep track of only the latest 62 tx frame attempts in this rate's
4227ac9a364SKalle Valo * history win; anything older isn't really relevant any more.
4237ac9a364SKalle Valo * If we have filled up the sliding win, drop the oldest attempt;
4247ac9a364SKalle Valo * if the oldest attempt (highest bit in bitmap) shows "success",
4257ac9a364SKalle Valo * subtract "1" from the success counter (this is the main reason
4267ac9a364SKalle Valo * we keep these bitmaps!).
4277ac9a364SKalle Valo */
4287ac9a364SKalle Valo while (attempts > 0) {
4297ac9a364SKalle Valo if (win->counter >= RATE_MAX_WINDOW) {
4307ac9a364SKalle Valo
4317ac9a364SKalle Valo /* remove earliest */
4327ac9a364SKalle Valo win->counter = RATE_MAX_WINDOW - 1;
4337ac9a364SKalle Valo
4347ac9a364SKalle Valo if (win->data & mask) {
4357ac9a364SKalle Valo win->data &= ~mask;
4367ac9a364SKalle Valo win->success_counter--;
4377ac9a364SKalle Valo }
4387ac9a364SKalle Valo }
4397ac9a364SKalle Valo
4407ac9a364SKalle Valo /* Increment frames-attempted counter */
4417ac9a364SKalle Valo win->counter++;
4427ac9a364SKalle Valo
4437ac9a364SKalle Valo /* Shift bitmap by one frame to throw away oldest history */
4447ac9a364SKalle Valo win->data <<= 1;
4457ac9a364SKalle Valo
4467ac9a364SKalle Valo /* Mark the most recent #successes attempts as successful */
4477ac9a364SKalle Valo if (successes > 0) {
4487ac9a364SKalle Valo win->success_counter++;
4497ac9a364SKalle Valo win->data |= 0x1;
4507ac9a364SKalle Valo successes--;
4517ac9a364SKalle Valo }
4527ac9a364SKalle Valo
4537ac9a364SKalle Valo attempts--;
4547ac9a364SKalle Valo }
4557ac9a364SKalle Valo
4567ac9a364SKalle Valo /* Calculate current success ratio, avoid divide-by-0! */
4577ac9a364SKalle Valo if (win->counter > 0)
4587ac9a364SKalle Valo win->success_ratio =
4597ac9a364SKalle Valo 128 * (100 * win->success_counter) / win->counter;
4607ac9a364SKalle Valo else
4617ac9a364SKalle Valo win->success_ratio = IL_INVALID_VALUE;
4627ac9a364SKalle Valo
4637ac9a364SKalle Valo fail_count = win->counter - win->success_counter;
4647ac9a364SKalle Valo
4657ac9a364SKalle Valo /* Calculate average throughput, if we have enough history. */
4667ac9a364SKalle Valo if (fail_count >= RATE_MIN_FAILURE_TH ||
4677ac9a364SKalle Valo win->success_counter >= RATE_MIN_SUCCESS_TH)
4687ac9a364SKalle Valo win->average_tpt = (win->success_ratio * tpt + 64) / 128;
4697ac9a364SKalle Valo else
4707ac9a364SKalle Valo win->average_tpt = IL_INVALID_VALUE;
4717ac9a364SKalle Valo
4727ac9a364SKalle Valo /* Tag this win as having been updated */
4737ac9a364SKalle Valo win->stamp = jiffies;
4747ac9a364SKalle Valo
4757ac9a364SKalle Valo return 0;
4767ac9a364SKalle Valo }
4777ac9a364SKalle Valo
4787ac9a364SKalle Valo /*
4797ac9a364SKalle Valo * Fill uCode API rate_n_flags field, based on "search" or "active" table.
4807ac9a364SKalle Valo */
4817ac9a364SKalle Valo static u32
il4965_rate_n_flags_from_tbl(struct il_priv * il,struct il_scale_tbl_info * tbl,int idx,u8 use_green)4827ac9a364SKalle Valo il4965_rate_n_flags_from_tbl(struct il_priv *il, struct il_scale_tbl_info *tbl,
4837ac9a364SKalle Valo int idx, u8 use_green)
4847ac9a364SKalle Valo {
4857ac9a364SKalle Valo u32 rate_n_flags = 0;
4867ac9a364SKalle Valo
4877ac9a364SKalle Valo if (is_legacy(tbl->lq_type)) {
4887ac9a364SKalle Valo rate_n_flags = il_rates[idx].plcp;
4897ac9a364SKalle Valo if (idx >= IL_FIRST_CCK_RATE && idx <= IL_LAST_CCK_RATE)
4907ac9a364SKalle Valo rate_n_flags |= RATE_MCS_CCK_MSK;
4917ac9a364SKalle Valo
4927ac9a364SKalle Valo } else if (is_Ht(tbl->lq_type)) {
4937ac9a364SKalle Valo if (idx > IL_LAST_OFDM_RATE) {
4947ac9a364SKalle Valo IL_ERR("Invalid HT rate idx %d\n", idx);
4957ac9a364SKalle Valo idx = IL_LAST_OFDM_RATE;
4967ac9a364SKalle Valo }
4977ac9a364SKalle Valo rate_n_flags = RATE_MCS_HT_MSK;
4987ac9a364SKalle Valo
4997ac9a364SKalle Valo if (is_siso(tbl->lq_type))
5007ac9a364SKalle Valo rate_n_flags |= il_rates[idx].plcp_siso;
5017ac9a364SKalle Valo else
5027ac9a364SKalle Valo rate_n_flags |= il_rates[idx].plcp_mimo2;
5037ac9a364SKalle Valo } else {
5047ac9a364SKalle Valo IL_ERR("Invalid tbl->lq_type %d\n", tbl->lq_type);
5057ac9a364SKalle Valo }
5067ac9a364SKalle Valo
5077ac9a364SKalle Valo rate_n_flags |=
5087ac9a364SKalle Valo ((tbl->ant_type << RATE_MCS_ANT_POS) & RATE_MCS_ANT_ABC_MSK);
5097ac9a364SKalle Valo
5107ac9a364SKalle Valo if (is_Ht(tbl->lq_type)) {
5117ac9a364SKalle Valo if (tbl->is_ht40) {
5127ac9a364SKalle Valo if (tbl->is_dup)
5137ac9a364SKalle Valo rate_n_flags |= RATE_MCS_DUP_MSK;
5147ac9a364SKalle Valo else
5157ac9a364SKalle Valo rate_n_flags |= RATE_MCS_HT40_MSK;
5167ac9a364SKalle Valo }
5177ac9a364SKalle Valo if (tbl->is_SGI)
5187ac9a364SKalle Valo rate_n_flags |= RATE_MCS_SGI_MSK;
5197ac9a364SKalle Valo
5207ac9a364SKalle Valo if (use_green) {
5217ac9a364SKalle Valo rate_n_flags |= RATE_MCS_GF_MSK;
5227ac9a364SKalle Valo if (is_siso(tbl->lq_type) && tbl->is_SGI) {
5237ac9a364SKalle Valo rate_n_flags &= ~RATE_MCS_SGI_MSK;
5247ac9a364SKalle Valo IL_ERR("GF was set with SGI:SISO\n");
5257ac9a364SKalle Valo }
5267ac9a364SKalle Valo }
5277ac9a364SKalle Valo }
5287ac9a364SKalle Valo return rate_n_flags;
5297ac9a364SKalle Valo }
5307ac9a364SKalle Valo
5317ac9a364SKalle Valo /*
5327ac9a364SKalle Valo * Interpret uCode API's rate_n_flags format,
5337ac9a364SKalle Valo * fill "search" or "active" tx mode table.
5347ac9a364SKalle Valo */
5357ac9a364SKalle Valo static int
il4965_rs_get_tbl_info_from_mcs(const u32 rate_n_flags,enum nl80211_band band,struct il_scale_tbl_info * tbl,int * rate_idx)5367ac9a364SKalle Valo il4965_rs_get_tbl_info_from_mcs(const u32 rate_n_flags,
53757fbcce3SJohannes Berg enum nl80211_band band,
5387ac9a364SKalle Valo struct il_scale_tbl_info *tbl, int *rate_idx)
5397ac9a364SKalle Valo {
5407ac9a364SKalle Valo u32 ant_msk = (rate_n_flags & RATE_MCS_ANT_ABC_MSK);
5417ac9a364SKalle Valo u8 il4965_num_of_ant =
5427ac9a364SKalle Valo il4965_get_il4965_num_of_ant_from_rate(rate_n_flags);
5437ac9a364SKalle Valo u8 mcs;
5447ac9a364SKalle Valo
5457ac9a364SKalle Valo memset(tbl, 0, sizeof(struct il_scale_tbl_info));
5467ac9a364SKalle Valo *rate_idx = il4965_hwrate_to_plcp_idx(rate_n_flags);
5477ac9a364SKalle Valo
5487ac9a364SKalle Valo if (*rate_idx == RATE_INVALID) {
5497ac9a364SKalle Valo *rate_idx = -1;
5507ac9a364SKalle Valo return -EINVAL;
5517ac9a364SKalle Valo }
5527ac9a364SKalle Valo tbl->is_SGI = 0; /* default legacy setup */
5537ac9a364SKalle Valo tbl->is_ht40 = 0;
5547ac9a364SKalle Valo tbl->is_dup = 0;
5557ac9a364SKalle Valo tbl->ant_type = (ant_msk >> RATE_MCS_ANT_POS);
5567ac9a364SKalle Valo tbl->lq_type = LQ_NONE;
5577ac9a364SKalle Valo tbl->max_search = IL_MAX_SEARCH;
5587ac9a364SKalle Valo
5597ac9a364SKalle Valo /* legacy rate format */
5607ac9a364SKalle Valo if (!(rate_n_flags & RATE_MCS_HT_MSK)) {
5617ac9a364SKalle Valo if (il4965_num_of_ant == 1) {
56257fbcce3SJohannes Berg if (band == NL80211_BAND_5GHZ)
5637ac9a364SKalle Valo tbl->lq_type = LQ_A;
5647ac9a364SKalle Valo else
5657ac9a364SKalle Valo tbl->lq_type = LQ_G;
5667ac9a364SKalle Valo }
5677ac9a364SKalle Valo /* HT rate format */
5687ac9a364SKalle Valo } else {
5697ac9a364SKalle Valo if (rate_n_flags & RATE_MCS_SGI_MSK)
5707ac9a364SKalle Valo tbl->is_SGI = 1;
5717ac9a364SKalle Valo
5727ac9a364SKalle Valo if ((rate_n_flags & RATE_MCS_HT40_MSK) ||
5737ac9a364SKalle Valo (rate_n_flags & RATE_MCS_DUP_MSK))
5747ac9a364SKalle Valo tbl->is_ht40 = 1;
5757ac9a364SKalle Valo
5767ac9a364SKalle Valo if (rate_n_flags & RATE_MCS_DUP_MSK)
5777ac9a364SKalle Valo tbl->is_dup = 1;
5787ac9a364SKalle Valo
5797ac9a364SKalle Valo mcs = il4965_rs_extract_rate(rate_n_flags);
5807ac9a364SKalle Valo
5817ac9a364SKalle Valo /* SISO */
5827ac9a364SKalle Valo if (mcs <= RATE_SISO_60M_PLCP) {
5837ac9a364SKalle Valo if (il4965_num_of_ant == 1)
5847ac9a364SKalle Valo tbl->lq_type = LQ_SISO; /*else NONE */
5857ac9a364SKalle Valo /* MIMO2 */
5867ac9a364SKalle Valo } else {
5877ac9a364SKalle Valo if (il4965_num_of_ant == 2)
5887ac9a364SKalle Valo tbl->lq_type = LQ_MIMO2;
5897ac9a364SKalle Valo }
5907ac9a364SKalle Valo }
5917ac9a364SKalle Valo return 0;
5927ac9a364SKalle Valo }
5937ac9a364SKalle Valo
5947ac9a364SKalle Valo /* switch to another antenna/antennas and return 1 */
5957ac9a364SKalle Valo /* if no other valid antenna found, return 0 */
5967ac9a364SKalle Valo static int
il4965_rs_toggle_antenna(u32 valid_ant,u32 * rate_n_flags,struct il_scale_tbl_info * tbl)5977ac9a364SKalle Valo il4965_rs_toggle_antenna(u32 valid_ant, u32 *rate_n_flags,
5987ac9a364SKalle Valo struct il_scale_tbl_info *tbl)
5997ac9a364SKalle Valo {
6007ac9a364SKalle Valo u8 new_ant_type;
6017ac9a364SKalle Valo
6027ac9a364SKalle Valo if (!tbl->ant_type || tbl->ant_type > ANT_ABC)
6037ac9a364SKalle Valo return 0;
6047ac9a364SKalle Valo
6057ac9a364SKalle Valo if (!il4965_rs_is_valid_ant(valid_ant, tbl->ant_type))
6067ac9a364SKalle Valo return 0;
6077ac9a364SKalle Valo
6087ac9a364SKalle Valo new_ant_type = ant_toggle_lookup[tbl->ant_type];
6097ac9a364SKalle Valo
6107ac9a364SKalle Valo while (new_ant_type != tbl->ant_type &&
6117ac9a364SKalle Valo !il4965_rs_is_valid_ant(valid_ant, new_ant_type))
6127ac9a364SKalle Valo new_ant_type = ant_toggle_lookup[new_ant_type];
6137ac9a364SKalle Valo
6147ac9a364SKalle Valo if (new_ant_type == tbl->ant_type)
6157ac9a364SKalle Valo return 0;
6167ac9a364SKalle Valo
6177ac9a364SKalle Valo tbl->ant_type = new_ant_type;
6187ac9a364SKalle Valo *rate_n_flags &= ~RATE_MCS_ANT_ABC_MSK;
6197ac9a364SKalle Valo *rate_n_flags |= new_ant_type << RATE_MCS_ANT_POS;
6207ac9a364SKalle Valo return 1;
6217ac9a364SKalle Valo }
6227ac9a364SKalle Valo
6233ecf6a3dSLee Jones /*
6247ac9a364SKalle Valo * Green-field mode is valid if the station supports it and
6257ac9a364SKalle Valo * there are no non-GF stations present in the BSS.
6267ac9a364SKalle Valo */
6277ac9a364SKalle Valo static bool
il4965_rs_use_green(struct il_priv * il,struct ieee80211_sta * sta)6287ac9a364SKalle Valo il4965_rs_use_green(struct il_priv *il, struct ieee80211_sta *sta)
6297ac9a364SKalle Valo {
630046d2e7cSSriram R return (sta->deflink.ht_cap.cap & IEEE80211_HT_CAP_GRN_FLD) &&
6317ac9a364SKalle Valo !il->ht.non_gf_sta_present;
6327ac9a364SKalle Valo }
6337ac9a364SKalle Valo
6343ecf6a3dSLee Jones /*
6357ac9a364SKalle Valo * il4965_rs_get_supported_rates - get the available rates
6367ac9a364SKalle Valo *
6377ac9a364SKalle Valo * if management frame or broadcast frame only return
6387ac9a364SKalle Valo * basic available rates.
6397ac9a364SKalle Valo *
6407ac9a364SKalle Valo */
6417ac9a364SKalle Valo static u16
il4965_rs_get_supported_rates(struct il_lq_sta * lq_sta,struct ieee80211_hdr * hdr,enum il_table_type rate_type)6427ac9a364SKalle Valo il4965_rs_get_supported_rates(struct il_lq_sta *lq_sta,
6437ac9a364SKalle Valo struct ieee80211_hdr *hdr,
6447ac9a364SKalle Valo enum il_table_type rate_type)
6457ac9a364SKalle Valo {
6467ac9a364SKalle Valo if (is_legacy(rate_type)) {
6477ac9a364SKalle Valo return lq_sta->active_legacy_rate;
6487ac9a364SKalle Valo } else {
6497ac9a364SKalle Valo if (is_siso(rate_type))
6507ac9a364SKalle Valo return lq_sta->active_siso_rate;
6517ac9a364SKalle Valo else
6527ac9a364SKalle Valo return lq_sta->active_mimo2_rate;
6537ac9a364SKalle Valo }
6547ac9a364SKalle Valo }
6557ac9a364SKalle Valo
6567ac9a364SKalle Valo static u16
il4965_rs_get_adjacent_rate(struct il_priv * il,u8 idx,u16 rate_mask,int rate_type)6577ac9a364SKalle Valo il4965_rs_get_adjacent_rate(struct il_priv *il, u8 idx, u16 rate_mask,
6587ac9a364SKalle Valo int rate_type)
6597ac9a364SKalle Valo {
6607ac9a364SKalle Valo u8 high = RATE_INVALID;
6617ac9a364SKalle Valo u8 low = RATE_INVALID;
6627ac9a364SKalle Valo
6637ac9a364SKalle Valo /* 802.11A or ht walks to the next literal adjacent rate in
6647ac9a364SKalle Valo * the rate table */
6657ac9a364SKalle Valo if (is_a_band(rate_type) || !is_legacy(rate_type)) {
6667ac9a364SKalle Valo int i;
6677ac9a364SKalle Valo u32 mask;
6687ac9a364SKalle Valo
6697ac9a364SKalle Valo /* Find the previous rate that is in the rate mask */
6707ac9a364SKalle Valo i = idx - 1;
6717ac9a364SKalle Valo for (mask = (1 << i); i >= 0; i--, mask >>= 1) {
6727ac9a364SKalle Valo if (rate_mask & mask) {
6737ac9a364SKalle Valo low = i;
6747ac9a364SKalle Valo break;
6757ac9a364SKalle Valo }
6767ac9a364SKalle Valo }
6777ac9a364SKalle Valo
6787ac9a364SKalle Valo /* Find the next rate that is in the rate mask */
6797ac9a364SKalle Valo i = idx + 1;
6807ac9a364SKalle Valo for (mask = (1 << i); i < RATE_COUNT; i++, mask <<= 1) {
6817ac9a364SKalle Valo if (rate_mask & mask) {
6827ac9a364SKalle Valo high = i;
6837ac9a364SKalle Valo break;
6847ac9a364SKalle Valo }
6857ac9a364SKalle Valo }
6867ac9a364SKalle Valo
6877ac9a364SKalle Valo return (high << 8) | low;
6887ac9a364SKalle Valo }
6897ac9a364SKalle Valo
6907ac9a364SKalle Valo low = idx;
6917ac9a364SKalle Valo while (low != RATE_INVALID) {
6927ac9a364SKalle Valo low = il_rates[low].prev_rs;
6937ac9a364SKalle Valo if (low == RATE_INVALID)
6947ac9a364SKalle Valo break;
6957ac9a364SKalle Valo if (rate_mask & (1 << low))
6967ac9a364SKalle Valo break;
6977ac9a364SKalle Valo D_RATE("Skipping masked lower rate: %d\n", low);
6987ac9a364SKalle Valo }
6997ac9a364SKalle Valo
7007ac9a364SKalle Valo high = idx;
7017ac9a364SKalle Valo while (high != RATE_INVALID) {
7027ac9a364SKalle Valo high = il_rates[high].next_rs;
7037ac9a364SKalle Valo if (high == RATE_INVALID)
7047ac9a364SKalle Valo break;
7057ac9a364SKalle Valo if (rate_mask & (1 << high))
7067ac9a364SKalle Valo break;
7077ac9a364SKalle Valo D_RATE("Skipping masked higher rate: %d\n", high);
7087ac9a364SKalle Valo }
7097ac9a364SKalle Valo
7107ac9a364SKalle Valo return (high << 8) | low;
7117ac9a364SKalle Valo }
7127ac9a364SKalle Valo
7137ac9a364SKalle Valo static u32
il4965_rs_get_lower_rate(struct il_lq_sta * lq_sta,struct il_scale_tbl_info * tbl,u8 scale_idx,u8 ht_possible)7147ac9a364SKalle Valo il4965_rs_get_lower_rate(struct il_lq_sta *lq_sta,
7157ac9a364SKalle Valo struct il_scale_tbl_info *tbl, u8 scale_idx,
7167ac9a364SKalle Valo u8 ht_possible)
7177ac9a364SKalle Valo {
7187ac9a364SKalle Valo s32 low;
7197ac9a364SKalle Valo u16 rate_mask;
7207ac9a364SKalle Valo u16 high_low;
7217ac9a364SKalle Valo u8 switch_to_legacy = 0;
7227ac9a364SKalle Valo u8 is_green = lq_sta->is_green;
7237ac9a364SKalle Valo struct il_priv *il = lq_sta->drv;
7247ac9a364SKalle Valo
7257ac9a364SKalle Valo /* check if we need to switch from HT to legacy rates.
7267ac9a364SKalle Valo * assumption is that mandatory rates (1Mbps or 6Mbps)
7277ac9a364SKalle Valo * are always supported (spec demand) */
7287ac9a364SKalle Valo if (!is_legacy(tbl->lq_type) && (!ht_possible || !scale_idx)) {
7297ac9a364SKalle Valo switch_to_legacy = 1;
7307ac9a364SKalle Valo scale_idx = rs_ht_to_legacy[scale_idx];
73157fbcce3SJohannes Berg if (lq_sta->band == NL80211_BAND_5GHZ)
7327ac9a364SKalle Valo tbl->lq_type = LQ_A;
7337ac9a364SKalle Valo else
7347ac9a364SKalle Valo tbl->lq_type = LQ_G;
7357ac9a364SKalle Valo
7367ac9a364SKalle Valo if (il4965_num_of_ant(tbl->ant_type) > 1)
7377ac9a364SKalle Valo tbl->ant_type =
7387ac9a364SKalle Valo il4965_first_antenna(il->hw_params.valid_tx_ant);
7397ac9a364SKalle Valo
7407ac9a364SKalle Valo tbl->is_ht40 = 0;
7417ac9a364SKalle Valo tbl->is_SGI = 0;
7427ac9a364SKalle Valo tbl->max_search = IL_MAX_SEARCH;
7437ac9a364SKalle Valo }
7447ac9a364SKalle Valo
7457ac9a364SKalle Valo rate_mask = il4965_rs_get_supported_rates(lq_sta, NULL, tbl->lq_type);
7467ac9a364SKalle Valo
7477ac9a364SKalle Valo /* Mask with station rate restriction */
7487ac9a364SKalle Valo if (is_legacy(tbl->lq_type)) {
7497ac9a364SKalle Valo /* supp_rates has no CCK bits in A mode */
75057fbcce3SJohannes Berg if (lq_sta->band == NL80211_BAND_5GHZ)
7517ac9a364SKalle Valo rate_mask =
7527ac9a364SKalle Valo (u16) (rate_mask &
7537ac9a364SKalle Valo (lq_sta->supp_rates << IL_FIRST_OFDM_RATE));
7547ac9a364SKalle Valo else
7557ac9a364SKalle Valo rate_mask = (u16) (rate_mask & lq_sta->supp_rates);
7567ac9a364SKalle Valo }
7577ac9a364SKalle Valo
7587ac9a364SKalle Valo /* If we switched from HT to legacy, check current rate */
7597ac9a364SKalle Valo if (switch_to_legacy && (rate_mask & (1 << scale_idx))) {
7607ac9a364SKalle Valo low = scale_idx;
7617ac9a364SKalle Valo goto out;
7627ac9a364SKalle Valo }
7637ac9a364SKalle Valo
7647ac9a364SKalle Valo high_low =
7657ac9a364SKalle Valo il4965_rs_get_adjacent_rate(lq_sta->drv, scale_idx, rate_mask,
7667ac9a364SKalle Valo tbl->lq_type);
7677ac9a364SKalle Valo low = high_low & 0xff;
7687ac9a364SKalle Valo
7697ac9a364SKalle Valo if (low == RATE_INVALID)
7707ac9a364SKalle Valo low = scale_idx;
7717ac9a364SKalle Valo
7727ac9a364SKalle Valo out:
7737ac9a364SKalle Valo return il4965_rate_n_flags_from_tbl(lq_sta->drv, tbl, low, is_green);
7747ac9a364SKalle Valo }
7757ac9a364SKalle Valo
7767ac9a364SKalle Valo /*
7777ac9a364SKalle Valo * Simple function to compare two rate scale table types
7787ac9a364SKalle Valo */
7797ac9a364SKalle Valo static bool
il4965_table_type_matches(struct il_scale_tbl_info * a,struct il_scale_tbl_info * b)7807ac9a364SKalle Valo il4965_table_type_matches(struct il_scale_tbl_info *a,
7817ac9a364SKalle Valo struct il_scale_tbl_info *b)
7827ac9a364SKalle Valo {
7837ac9a364SKalle Valo return (a->lq_type == b->lq_type && a->ant_type == b->ant_type &&
7847ac9a364SKalle Valo a->is_SGI == b->is_SGI);
7857ac9a364SKalle Valo }
7867ac9a364SKalle Valo
7877ac9a364SKalle Valo /*
7887ac9a364SKalle Valo * mac80211 sends us Tx status
7897ac9a364SKalle Valo */
7907ac9a364SKalle Valo static void
il4965_rs_tx_status(void * il_r,struct ieee80211_supported_band * sband,struct ieee80211_sta * sta,void * il_sta,struct sk_buff * skb)7917ac9a364SKalle Valo il4965_rs_tx_status(void *il_r, struct ieee80211_supported_band *sband,
7927ac9a364SKalle Valo struct ieee80211_sta *sta, void *il_sta,
7937ac9a364SKalle Valo struct sk_buff *skb)
7947ac9a364SKalle Valo {
7957ac9a364SKalle Valo int legacy_success;
7967ac9a364SKalle Valo int retries;
7977ac9a364SKalle Valo int rs_idx, mac_idx, i;
7987ac9a364SKalle Valo struct il_lq_sta *lq_sta = il_sta;
7997ac9a364SKalle Valo struct il_link_quality_cmd *table;
8007ac9a364SKalle Valo struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
8017ac9a364SKalle Valo struct il_priv *il = (struct il_priv *)il_r;
8027ac9a364SKalle Valo struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
8037ac9a364SKalle Valo enum mac80211_rate_control_flags mac_flags;
8047ac9a364SKalle Valo u32 tx_rate;
8057ac9a364SKalle Valo struct il_scale_tbl_info tbl_type;
8067ac9a364SKalle Valo struct il_scale_tbl_info *curr_tbl, *other_tbl, *tmp_tbl;
8077ac9a364SKalle Valo
8087ac9a364SKalle Valo D_RATE("get frame ack response, update rate scale win\n");
8097ac9a364SKalle Valo
8107ac9a364SKalle Valo /* Treat uninitialized rate scaling data same as non-existing. */
8117ac9a364SKalle Valo if (!lq_sta) {
8127ac9a364SKalle Valo D_RATE("Station rate scaling not created yet.\n");
8137ac9a364SKalle Valo return;
8147ac9a364SKalle Valo } else if (!lq_sta->drv) {
8157ac9a364SKalle Valo D_RATE("Rate scaling not initialized yet.\n");
8167ac9a364SKalle Valo return;
8177ac9a364SKalle Valo }
8187ac9a364SKalle Valo
8197ac9a364SKalle Valo if (!ieee80211_is_data(hdr->frame_control) ||
8207ac9a364SKalle Valo (info->flags & IEEE80211_TX_CTL_NO_ACK))
8217ac9a364SKalle Valo return;
8227ac9a364SKalle Valo
8237ac9a364SKalle Valo /* This packet was aggregated but doesn't carry status info */
8247ac9a364SKalle Valo if ((info->flags & IEEE80211_TX_CTL_AMPDU) &&
8257ac9a364SKalle Valo !(info->flags & IEEE80211_TX_STAT_AMPDU))
8267ac9a364SKalle Valo return;
8277ac9a364SKalle Valo
8287ac9a364SKalle Valo /*
8297ac9a364SKalle Valo * Ignore this Tx frame response if its initial rate doesn't match
8307ac9a364SKalle Valo * that of latest Link Quality command. There may be stragglers
8317ac9a364SKalle Valo * from a previous Link Quality command, but we're no longer interested
8327ac9a364SKalle Valo * in those; they're either from the "active" mode while we're trying
8337ac9a364SKalle Valo * to check "search" mode, or a prior "search" mode after we've moved
8347ac9a364SKalle Valo * to a new "search" mode (which might become the new "active" mode).
8357ac9a364SKalle Valo */
8367ac9a364SKalle Valo table = &lq_sta->lq;
8377ac9a364SKalle Valo tx_rate = le32_to_cpu(table->rs_table[0].rate_n_flags);
8387ac9a364SKalle Valo il4965_rs_get_tbl_info_from_mcs(tx_rate, il->band, &tbl_type, &rs_idx);
83957fbcce3SJohannes Berg if (il->band == NL80211_BAND_5GHZ)
8407ac9a364SKalle Valo rs_idx -= IL_FIRST_OFDM_RATE;
8417ac9a364SKalle Valo mac_flags = info->status.rates[0].flags;
8427ac9a364SKalle Valo mac_idx = info->status.rates[0].idx;
8437ac9a364SKalle Valo /* For HT packets, map MCS to PLCP */
8447ac9a364SKalle Valo if (mac_flags & IEEE80211_TX_RC_MCS) {
8457ac9a364SKalle Valo mac_idx &= RATE_MCS_CODE_MSK; /* Remove # of streams */
8467ac9a364SKalle Valo if (mac_idx >= (RATE_9M_IDX - IL_FIRST_OFDM_RATE))
8477ac9a364SKalle Valo mac_idx++;
8487ac9a364SKalle Valo /*
8497ac9a364SKalle Valo * mac80211 HT idx is always zero-idxed; we need to move
8507ac9a364SKalle Valo * HT OFDM rates after CCK rates in 2.4 GHz band
8517ac9a364SKalle Valo */
85257fbcce3SJohannes Berg if (il->band == NL80211_BAND_2GHZ)
8537ac9a364SKalle Valo mac_idx += IL_FIRST_OFDM_RATE;
8547ac9a364SKalle Valo }
8557ac9a364SKalle Valo /* Here we actually compare this rate to the latest LQ command */
8567ac9a364SKalle Valo if (mac_idx < 0 ||
8577ac9a364SKalle Valo tbl_type.is_SGI != !!(mac_flags & IEEE80211_TX_RC_SHORT_GI) ||
8587ac9a364SKalle Valo tbl_type.is_ht40 != !!(mac_flags & IEEE80211_TX_RC_40_MHZ_WIDTH) ||
8597ac9a364SKalle Valo tbl_type.is_dup != !!(mac_flags & IEEE80211_TX_RC_DUP_DATA) ||
8607ac9a364SKalle Valo tbl_type.ant_type != info->status.antenna ||
8617ac9a364SKalle Valo !!(tx_rate & RATE_MCS_HT_MSK) != !!(mac_flags & IEEE80211_TX_RC_MCS)
8627ac9a364SKalle Valo || !!(tx_rate & RATE_MCS_GF_MSK) !=
8637ac9a364SKalle Valo !!(mac_flags & IEEE80211_TX_RC_GREEN_FIELD) || rs_idx != mac_idx) {
8647ac9a364SKalle Valo D_RATE("initial rate %d does not match %d (0x%x)\n", mac_idx,
8657ac9a364SKalle Valo rs_idx, tx_rate);
8667ac9a364SKalle Valo /*
8677ac9a364SKalle Valo * Since rates mis-match, the last LQ command may have failed.
8687ac9a364SKalle Valo * After IL_MISSED_RATE_MAX mis-matches, resync the uCode with
8697ac9a364SKalle Valo * ... driver.
8707ac9a364SKalle Valo */
8717ac9a364SKalle Valo lq_sta->missed_rate_counter++;
8727ac9a364SKalle Valo if (lq_sta->missed_rate_counter > IL_MISSED_RATE_MAX) {
8737ac9a364SKalle Valo lq_sta->missed_rate_counter = 0;
8747ac9a364SKalle Valo il_send_lq_cmd(il, &lq_sta->lq, CMD_ASYNC, false);
8757ac9a364SKalle Valo }
8767ac9a364SKalle Valo /* Regardless, ignore this status info for outdated rate */
8777ac9a364SKalle Valo return;
8787ac9a364SKalle Valo } else
8797ac9a364SKalle Valo /* Rate did match, so reset the missed_rate_counter */
8807ac9a364SKalle Valo lq_sta->missed_rate_counter = 0;
8817ac9a364SKalle Valo
8827ac9a364SKalle Valo /* Figure out if rate scale algorithm is in active or search table */
8837ac9a364SKalle Valo if (il4965_table_type_matches
8847ac9a364SKalle Valo (&tbl_type, &(lq_sta->lq_info[lq_sta->active_tbl]))) {
8857ac9a364SKalle Valo curr_tbl = &(lq_sta->lq_info[lq_sta->active_tbl]);
8867ac9a364SKalle Valo other_tbl = &(lq_sta->lq_info[1 - lq_sta->active_tbl]);
8877ac9a364SKalle Valo } else
8887ac9a364SKalle Valo if (il4965_table_type_matches
8897ac9a364SKalle Valo (&tbl_type, &lq_sta->lq_info[1 - lq_sta->active_tbl])) {
8907ac9a364SKalle Valo curr_tbl = &(lq_sta->lq_info[1 - lq_sta->active_tbl]);
8917ac9a364SKalle Valo other_tbl = &(lq_sta->lq_info[lq_sta->active_tbl]);
8927ac9a364SKalle Valo } else {
8937ac9a364SKalle Valo D_RATE("Neither active nor search matches tx rate\n");
8947ac9a364SKalle Valo tmp_tbl = &(lq_sta->lq_info[lq_sta->active_tbl]);
8957ac9a364SKalle Valo D_RATE("active- lq:%x, ant:%x, SGI:%d\n", tmp_tbl->lq_type,
8967ac9a364SKalle Valo tmp_tbl->ant_type, tmp_tbl->is_SGI);
8977ac9a364SKalle Valo tmp_tbl = &(lq_sta->lq_info[1 - lq_sta->active_tbl]);
8987ac9a364SKalle Valo D_RATE("search- lq:%x, ant:%x, SGI:%d\n", tmp_tbl->lq_type,
8997ac9a364SKalle Valo tmp_tbl->ant_type, tmp_tbl->is_SGI);
9007ac9a364SKalle Valo D_RATE("actual- lq:%x, ant:%x, SGI:%d\n", tbl_type.lq_type,
9017ac9a364SKalle Valo tbl_type.ant_type, tbl_type.is_SGI);
9027ac9a364SKalle Valo /*
9037ac9a364SKalle Valo * no matching table found, let's by-pass the data collection
9047ac9a364SKalle Valo * and continue to perform rate scale to find the rate table
9057ac9a364SKalle Valo */
9067ac9a364SKalle Valo il4965_rs_stay_in_table(lq_sta, true);
9077ac9a364SKalle Valo goto done;
9087ac9a364SKalle Valo }
9097ac9a364SKalle Valo
9107ac9a364SKalle Valo /*
9117ac9a364SKalle Valo * Updating the frame history depends on whether packets were
9127ac9a364SKalle Valo * aggregated.
9137ac9a364SKalle Valo *
9147ac9a364SKalle Valo * For aggregation, all packets were transmitted at the same rate, the
9157ac9a364SKalle Valo * first idx into rate scale table.
9167ac9a364SKalle Valo */
9177ac9a364SKalle Valo if (info->flags & IEEE80211_TX_STAT_AMPDU) {
9187ac9a364SKalle Valo tx_rate = le32_to_cpu(table->rs_table[0].rate_n_flags);
9197ac9a364SKalle Valo il4965_rs_get_tbl_info_from_mcs(tx_rate, il->band, &tbl_type,
9207ac9a364SKalle Valo &rs_idx);
9217ac9a364SKalle Valo il4965_rs_collect_tx_data(curr_tbl, rs_idx,
9227ac9a364SKalle Valo info->status.ampdu_len,
9237ac9a364SKalle Valo info->status.ampdu_ack_len);
9247ac9a364SKalle Valo
9257ac9a364SKalle Valo /* Update success/fail counts if not searching for new mode */
9267ac9a364SKalle Valo if (lq_sta->stay_in_tbl) {
9277ac9a364SKalle Valo lq_sta->total_success += info->status.ampdu_ack_len;
9287ac9a364SKalle Valo lq_sta->total_failed +=
9297ac9a364SKalle Valo (info->status.ampdu_len -
9307ac9a364SKalle Valo info->status.ampdu_ack_len);
9317ac9a364SKalle Valo }
9327ac9a364SKalle Valo } else {
9337ac9a364SKalle Valo /*
9347ac9a364SKalle Valo * For legacy, update frame history with for each Tx retry.
9357ac9a364SKalle Valo */
9367ac9a364SKalle Valo retries = info->status.rates[0].count - 1;
9377ac9a364SKalle Valo /* HW doesn't send more than 15 retries */
9387ac9a364SKalle Valo retries = min(retries, 15);
9397ac9a364SKalle Valo
9407ac9a364SKalle Valo /* The last transmission may have been successful */
9417ac9a364SKalle Valo legacy_success = !!(info->flags & IEEE80211_TX_STAT_ACK);
9427ac9a364SKalle Valo /* Collect data for each rate used during failed TX attempts */
9437ac9a364SKalle Valo for (i = 0; i <= retries; ++i) {
9447ac9a364SKalle Valo tx_rate = le32_to_cpu(table->rs_table[i].rate_n_flags);
9457ac9a364SKalle Valo il4965_rs_get_tbl_info_from_mcs(tx_rate, il->band,
9467ac9a364SKalle Valo &tbl_type, &rs_idx);
9477ac9a364SKalle Valo /*
9487ac9a364SKalle Valo * Only collect stats if retried rate is in the same RS
9497ac9a364SKalle Valo * table as active/search.
9507ac9a364SKalle Valo */
9517ac9a364SKalle Valo if (il4965_table_type_matches(&tbl_type, curr_tbl))
9527ac9a364SKalle Valo tmp_tbl = curr_tbl;
9537ac9a364SKalle Valo else if (il4965_table_type_matches
9547ac9a364SKalle Valo (&tbl_type, other_tbl))
9557ac9a364SKalle Valo tmp_tbl = other_tbl;
9567ac9a364SKalle Valo else
9577ac9a364SKalle Valo continue;
9587ac9a364SKalle Valo il4965_rs_collect_tx_data(tmp_tbl, rs_idx, 1,
9597ac9a364SKalle Valo i <
9607ac9a364SKalle Valo retries ? 0 : legacy_success);
9617ac9a364SKalle Valo }
9627ac9a364SKalle Valo
9637ac9a364SKalle Valo /* Update success/fail counts if not searching for new mode */
9647ac9a364SKalle Valo if (lq_sta->stay_in_tbl) {
9657ac9a364SKalle Valo lq_sta->total_success += legacy_success;
9667ac9a364SKalle Valo lq_sta->total_failed += retries + (1 - legacy_success);
9677ac9a364SKalle Valo }
9687ac9a364SKalle Valo }
9697ac9a364SKalle Valo /* The last TX rate is cached in lq_sta; it's set in if/else above */
9707ac9a364SKalle Valo lq_sta->last_rate_n_flags = tx_rate;
9717ac9a364SKalle Valo done:
9727ac9a364SKalle Valo /* See if there's a better rate or modulation mode to try. */
973046d2e7cSSriram R if (sta->deflink.supp_rates[sband->band])
9747ac9a364SKalle Valo il4965_rs_rate_scale_perform(il, skb, sta, lq_sta);
9757ac9a364SKalle Valo }
9767ac9a364SKalle Valo
9777ac9a364SKalle Valo /*
9787ac9a364SKalle Valo * Begin a period of staying with a selected modulation mode.
9797ac9a364SKalle Valo * Set "stay_in_tbl" flag to prevent any mode switches.
9807ac9a364SKalle Valo * Set frame tx success limits according to legacy vs. high-throughput,
9817ac9a364SKalle Valo * and reset overall (spanning all rates) tx success history stats.
9827ac9a364SKalle Valo * These control how long we stay using same modulation mode before
9837ac9a364SKalle Valo * searching for a new mode.
9847ac9a364SKalle Valo */
9857ac9a364SKalle Valo static void
il4965_rs_set_stay_in_table(struct il_priv * il,u8 is_legacy,struct il_lq_sta * lq_sta)9867ac9a364SKalle Valo il4965_rs_set_stay_in_table(struct il_priv *il, u8 is_legacy,
9877ac9a364SKalle Valo struct il_lq_sta *lq_sta)
9887ac9a364SKalle Valo {
9897ac9a364SKalle Valo D_RATE("we are staying in the same table\n");
9907ac9a364SKalle Valo lq_sta->stay_in_tbl = 1; /* only place this gets set */
9917ac9a364SKalle Valo if (is_legacy) {
9927ac9a364SKalle Valo lq_sta->table_count_limit = IL_LEGACY_TBL_COUNT;
9937ac9a364SKalle Valo lq_sta->max_failure_limit = IL_LEGACY_FAILURE_LIMIT;
9947ac9a364SKalle Valo lq_sta->max_success_limit = IL_LEGACY_SUCCESS_LIMIT;
9957ac9a364SKalle Valo } else {
9967ac9a364SKalle Valo lq_sta->table_count_limit = IL_NONE_LEGACY_TBL_COUNT;
9977ac9a364SKalle Valo lq_sta->max_failure_limit = IL_NONE_LEGACY_FAILURE_LIMIT;
9987ac9a364SKalle Valo lq_sta->max_success_limit = IL_NONE_LEGACY_SUCCESS_LIMIT;
9997ac9a364SKalle Valo }
10007ac9a364SKalle Valo lq_sta->table_count = 0;
10017ac9a364SKalle Valo lq_sta->total_failed = 0;
10027ac9a364SKalle Valo lq_sta->total_success = 0;
10037ac9a364SKalle Valo lq_sta->flush_timer = jiffies;
10047ac9a364SKalle Valo lq_sta->action_counter = 0;
10057ac9a364SKalle Valo }
10067ac9a364SKalle Valo
10077ac9a364SKalle Valo /*
10087ac9a364SKalle Valo * Find correct throughput table for given mode of modulation
10097ac9a364SKalle Valo */
10107ac9a364SKalle Valo static void
il4965_rs_set_expected_tpt_table(struct il_lq_sta * lq_sta,struct il_scale_tbl_info * tbl)10117ac9a364SKalle Valo il4965_rs_set_expected_tpt_table(struct il_lq_sta *lq_sta,
10127ac9a364SKalle Valo struct il_scale_tbl_info *tbl)
10137ac9a364SKalle Valo {
10147ac9a364SKalle Valo /* Used to choose among HT tables */
10157ac9a364SKalle Valo s32(*ht_tbl_pointer)[RATE_COUNT];
10167ac9a364SKalle Valo
10177ac9a364SKalle Valo /* Check for invalid LQ type */
10187ac9a364SKalle Valo if (WARN_ON_ONCE(!is_legacy(tbl->lq_type) && !is_Ht(tbl->lq_type))) {
10197ac9a364SKalle Valo tbl->expected_tpt = expected_tpt_legacy;
10207ac9a364SKalle Valo return;
10217ac9a364SKalle Valo }
10227ac9a364SKalle Valo
10237ac9a364SKalle Valo /* Legacy rates have only one table */
10247ac9a364SKalle Valo if (is_legacy(tbl->lq_type)) {
10257ac9a364SKalle Valo tbl->expected_tpt = expected_tpt_legacy;
10267ac9a364SKalle Valo return;
10277ac9a364SKalle Valo }
10287ac9a364SKalle Valo
10297ac9a364SKalle Valo /* Choose among many HT tables depending on number of streams
10307ac9a364SKalle Valo * (SISO/MIMO2), channel width (20/40), SGI, and aggregation
10317ac9a364SKalle Valo * status */
10327ac9a364SKalle Valo if (is_siso(tbl->lq_type) && (!tbl->is_ht40 || lq_sta->is_dup))
10337ac9a364SKalle Valo ht_tbl_pointer = expected_tpt_siso20MHz;
10347ac9a364SKalle Valo else if (is_siso(tbl->lq_type))
10357ac9a364SKalle Valo ht_tbl_pointer = expected_tpt_siso40MHz;
10367ac9a364SKalle Valo else if (is_mimo2(tbl->lq_type) && (!tbl->is_ht40 || lq_sta->is_dup))
10377ac9a364SKalle Valo ht_tbl_pointer = expected_tpt_mimo2_20MHz;
10387ac9a364SKalle Valo else /* if (is_mimo2(tbl->lq_type)) <-- must be true */
10397ac9a364SKalle Valo ht_tbl_pointer = expected_tpt_mimo2_40MHz;
10407ac9a364SKalle Valo
10417ac9a364SKalle Valo if (!tbl->is_SGI && !lq_sta->is_agg) /* Normal */
10427ac9a364SKalle Valo tbl->expected_tpt = ht_tbl_pointer[0];
10437ac9a364SKalle Valo else if (tbl->is_SGI && !lq_sta->is_agg) /* SGI */
10447ac9a364SKalle Valo tbl->expected_tpt = ht_tbl_pointer[1];
10457ac9a364SKalle Valo else if (!tbl->is_SGI && lq_sta->is_agg) /* AGG */
10467ac9a364SKalle Valo tbl->expected_tpt = ht_tbl_pointer[2];
10477ac9a364SKalle Valo else /* AGG+SGI */
10487ac9a364SKalle Valo tbl->expected_tpt = ht_tbl_pointer[3];
10497ac9a364SKalle Valo }
10507ac9a364SKalle Valo
10517ac9a364SKalle Valo /*
10527ac9a364SKalle Valo * Find starting rate for new "search" high-throughput mode of modulation.
10537ac9a364SKalle Valo * Goal is to find lowest expected rate (under perfect conditions) that is
10547ac9a364SKalle Valo * above the current measured throughput of "active" mode, to give new mode
10557ac9a364SKalle Valo * a fair chance to prove itself without too many challenges.
10567ac9a364SKalle Valo *
10577ac9a364SKalle Valo * This gets called when transitioning to more aggressive modulation
10587ac9a364SKalle Valo * (i.e. legacy to SISO or MIMO, or SISO to MIMO), as well as less aggressive
10597ac9a364SKalle Valo * (i.e. MIMO to SISO). When moving to MIMO, bit rate will typically need
10607ac9a364SKalle Valo * to decrease to match "active" throughput. When moving from MIMO to SISO,
10617ac9a364SKalle Valo * bit rate will typically need to increase, but not if performance was bad.
10627ac9a364SKalle Valo */
10637ac9a364SKalle Valo static s32
il4965_rs_get_best_rate(struct il_priv * il,struct il_lq_sta * lq_sta,struct il_scale_tbl_info * tbl,u16 rate_mask,s8 idx)10647ac9a364SKalle Valo il4965_rs_get_best_rate(struct il_priv *il, struct il_lq_sta *lq_sta,
10657ac9a364SKalle Valo struct il_scale_tbl_info *tbl, /* "search" */
10667ac9a364SKalle Valo u16 rate_mask, s8 idx)
10677ac9a364SKalle Valo {
10687ac9a364SKalle Valo /* "active" values */
10697ac9a364SKalle Valo struct il_scale_tbl_info *active_tbl =
10707ac9a364SKalle Valo &(lq_sta->lq_info[lq_sta->active_tbl]);
10717ac9a364SKalle Valo s32 active_sr = active_tbl->win[idx].success_ratio;
10727ac9a364SKalle Valo s32 active_tpt = active_tbl->expected_tpt[idx];
10737ac9a364SKalle Valo
10747ac9a364SKalle Valo /* expected "search" throughput */
10757ac9a364SKalle Valo s32 *tpt_tbl = tbl->expected_tpt;
10767ac9a364SKalle Valo
10777ac9a364SKalle Valo s32 new_rate, high, low, start_hi;
10787ac9a364SKalle Valo u16 high_low;
10797ac9a364SKalle Valo s8 rate = idx;
10807ac9a364SKalle Valo
10817ac9a364SKalle Valo new_rate = high = low = start_hi = RATE_INVALID;
10827ac9a364SKalle Valo
10837ac9a364SKalle Valo for (;;) {
10847ac9a364SKalle Valo high_low =
10857ac9a364SKalle Valo il4965_rs_get_adjacent_rate(il, rate, rate_mask,
10867ac9a364SKalle Valo tbl->lq_type);
10877ac9a364SKalle Valo
10887ac9a364SKalle Valo low = high_low & 0xff;
10897ac9a364SKalle Valo high = (high_low >> 8) & 0xff;
10907ac9a364SKalle Valo
10917ac9a364SKalle Valo /*
10927ac9a364SKalle Valo * Lower the "search" bit rate, to give new "search" mode
10937ac9a364SKalle Valo * approximately the same throughput as "active" if:
10947ac9a364SKalle Valo *
10957ac9a364SKalle Valo * 1) "Active" mode has been working modestly well (but not
10967ac9a364SKalle Valo * great), and expected "search" throughput (under perfect
10977ac9a364SKalle Valo * conditions) at candidate rate is above the actual
10987ac9a364SKalle Valo * measured "active" throughput (but less than expected
10997ac9a364SKalle Valo * "active" throughput under perfect conditions).
11007ac9a364SKalle Valo * OR
11017ac9a364SKalle Valo * 2) "Active" mode has been working perfectly or very well
11027ac9a364SKalle Valo * and expected "search" throughput (under perfect
11037ac9a364SKalle Valo * conditions) at candidate rate is above expected
11047ac9a364SKalle Valo * "active" throughput (under perfect conditions).
11057ac9a364SKalle Valo */
11067ac9a364SKalle Valo if ((100 * tpt_tbl[rate] > lq_sta->last_tpt &&
11077ac9a364SKalle Valo (active_sr > RATE_DECREASE_TH && active_sr <= RATE_HIGH_TH
11087ac9a364SKalle Valo && tpt_tbl[rate] <= active_tpt)) ||
11097ac9a364SKalle Valo (active_sr >= RATE_SCALE_SWITCH &&
11107ac9a364SKalle Valo tpt_tbl[rate] > active_tpt)) {
11117ac9a364SKalle Valo
11127ac9a364SKalle Valo /* (2nd or later pass)
11137ac9a364SKalle Valo * If we've already tried to raise the rate, and are
11147ac9a364SKalle Valo * now trying to lower it, use the higher rate. */
11157ac9a364SKalle Valo if (start_hi != RATE_INVALID) {
11167ac9a364SKalle Valo new_rate = start_hi;
11177ac9a364SKalle Valo break;
11187ac9a364SKalle Valo }
11197ac9a364SKalle Valo
11207ac9a364SKalle Valo new_rate = rate;
11217ac9a364SKalle Valo
11227ac9a364SKalle Valo /* Loop again with lower rate */
11237ac9a364SKalle Valo if (low != RATE_INVALID)
11247ac9a364SKalle Valo rate = low;
11257ac9a364SKalle Valo
11267ac9a364SKalle Valo /* Lower rate not available, use the original */
11277ac9a364SKalle Valo else
11287ac9a364SKalle Valo break;
11297ac9a364SKalle Valo
11307ac9a364SKalle Valo /* Else try to raise the "search" rate to match "active" */
11317ac9a364SKalle Valo } else {
11327ac9a364SKalle Valo /* (2nd or later pass)
11337ac9a364SKalle Valo * If we've already tried to lower the rate, and are
11347ac9a364SKalle Valo * now trying to raise it, use the lower rate. */
11357ac9a364SKalle Valo if (new_rate != RATE_INVALID)
11367ac9a364SKalle Valo break;
11377ac9a364SKalle Valo
11387ac9a364SKalle Valo /* Loop again with higher rate */
11397ac9a364SKalle Valo else if (high != RATE_INVALID) {
11407ac9a364SKalle Valo start_hi = high;
11417ac9a364SKalle Valo rate = high;
11427ac9a364SKalle Valo
11437ac9a364SKalle Valo /* Higher rate not available, use the original */
11447ac9a364SKalle Valo } else {
11457ac9a364SKalle Valo new_rate = rate;
11467ac9a364SKalle Valo break;
11477ac9a364SKalle Valo }
11487ac9a364SKalle Valo }
11497ac9a364SKalle Valo }
11507ac9a364SKalle Valo
11517ac9a364SKalle Valo return new_rate;
11527ac9a364SKalle Valo }
11537ac9a364SKalle Valo
11547ac9a364SKalle Valo /*
11557ac9a364SKalle Valo * Set up search table for MIMO2
11567ac9a364SKalle Valo */
11577ac9a364SKalle Valo static int
il4965_rs_switch_to_mimo2(struct il_priv * il,struct il_lq_sta * lq_sta,struct ieee80211_conf * conf,struct ieee80211_sta * sta,struct il_scale_tbl_info * tbl,int idx)11587ac9a364SKalle Valo il4965_rs_switch_to_mimo2(struct il_priv *il, struct il_lq_sta *lq_sta,
11597ac9a364SKalle Valo struct ieee80211_conf *conf,
11607ac9a364SKalle Valo struct ieee80211_sta *sta,
11617ac9a364SKalle Valo struct il_scale_tbl_info *tbl, int idx)
11627ac9a364SKalle Valo {
11637ac9a364SKalle Valo u16 rate_mask;
11647ac9a364SKalle Valo s32 rate;
11657ac9a364SKalle Valo s8 is_green = lq_sta->is_green;
11667ac9a364SKalle Valo
1167046d2e7cSSriram R if (!conf_is_ht(conf) || !sta->deflink.ht_cap.ht_supported)
11687ac9a364SKalle Valo return -1;
11697ac9a364SKalle Valo
1170*261ce887SBenjamin Berg if (sta->deflink.smps_mode == IEEE80211_SMPS_STATIC)
11717ac9a364SKalle Valo return -1;
11727ac9a364SKalle Valo
11737ac9a364SKalle Valo /* Need both Tx chains/antennas to support MIMO */
11747ac9a364SKalle Valo if (il->hw_params.tx_chains_num < 2)
11757ac9a364SKalle Valo return -1;
11767ac9a364SKalle Valo
11777ac9a364SKalle Valo D_RATE("LQ: try to switch to MIMO2\n");
11787ac9a364SKalle Valo
11797ac9a364SKalle Valo tbl->lq_type = LQ_MIMO2;
11807ac9a364SKalle Valo tbl->is_dup = lq_sta->is_dup;
11817ac9a364SKalle Valo tbl->action = 0;
11827ac9a364SKalle Valo tbl->max_search = IL_MAX_SEARCH;
11837ac9a364SKalle Valo rate_mask = lq_sta->active_mimo2_rate;
11847ac9a364SKalle Valo
1185046d2e7cSSriram R if (il_is_ht40_tx_allowed(il, &sta->deflink.ht_cap))
11867ac9a364SKalle Valo tbl->is_ht40 = 1;
11877ac9a364SKalle Valo else
11887ac9a364SKalle Valo tbl->is_ht40 = 0;
11897ac9a364SKalle Valo
11907ac9a364SKalle Valo il4965_rs_set_expected_tpt_table(lq_sta, tbl);
11917ac9a364SKalle Valo
11927ac9a364SKalle Valo rate = il4965_rs_get_best_rate(il, lq_sta, tbl, rate_mask, idx);
11937ac9a364SKalle Valo
11947ac9a364SKalle Valo D_RATE("LQ: MIMO2 best rate %d mask %X\n", rate, rate_mask);
11957ac9a364SKalle Valo if (rate == RATE_INVALID || !((1 << rate) & rate_mask)) {
11967ac9a364SKalle Valo D_RATE("Can't switch with idx %d rate mask %x\n", rate,
11977ac9a364SKalle Valo rate_mask);
11987ac9a364SKalle Valo return -1;
11997ac9a364SKalle Valo }
12007ac9a364SKalle Valo tbl->current_rate =
12017ac9a364SKalle Valo il4965_rate_n_flags_from_tbl(il, tbl, rate, is_green);
12027ac9a364SKalle Valo
12037ac9a364SKalle Valo D_RATE("LQ: Switch to new mcs %X idx is green %X\n", tbl->current_rate,
12047ac9a364SKalle Valo is_green);
12057ac9a364SKalle Valo return 0;
12067ac9a364SKalle Valo }
12077ac9a364SKalle Valo
12087ac9a364SKalle Valo /*
12097ac9a364SKalle Valo * Set up search table for SISO
12107ac9a364SKalle Valo */
12117ac9a364SKalle Valo static int
il4965_rs_switch_to_siso(struct il_priv * il,struct il_lq_sta * lq_sta,struct ieee80211_conf * conf,struct ieee80211_sta * sta,struct il_scale_tbl_info * tbl,int idx)12127ac9a364SKalle Valo il4965_rs_switch_to_siso(struct il_priv *il, struct il_lq_sta *lq_sta,
12137ac9a364SKalle Valo struct ieee80211_conf *conf, struct ieee80211_sta *sta,
12147ac9a364SKalle Valo struct il_scale_tbl_info *tbl, int idx)
12157ac9a364SKalle Valo {
12167ac9a364SKalle Valo u16 rate_mask;
12177ac9a364SKalle Valo u8 is_green = lq_sta->is_green;
12187ac9a364SKalle Valo s32 rate;
12197ac9a364SKalle Valo
1220046d2e7cSSriram R if (!conf_is_ht(conf) || !sta->deflink.ht_cap.ht_supported)
12217ac9a364SKalle Valo return -1;
12227ac9a364SKalle Valo
12237ac9a364SKalle Valo D_RATE("LQ: try to switch to SISO\n");
12247ac9a364SKalle Valo
12257ac9a364SKalle Valo tbl->is_dup = lq_sta->is_dup;
12267ac9a364SKalle Valo tbl->lq_type = LQ_SISO;
12277ac9a364SKalle Valo tbl->action = 0;
12287ac9a364SKalle Valo tbl->max_search = IL_MAX_SEARCH;
12297ac9a364SKalle Valo rate_mask = lq_sta->active_siso_rate;
12307ac9a364SKalle Valo
1231046d2e7cSSriram R if (il_is_ht40_tx_allowed(il, &sta->deflink.ht_cap))
12327ac9a364SKalle Valo tbl->is_ht40 = 1;
12337ac9a364SKalle Valo else
12347ac9a364SKalle Valo tbl->is_ht40 = 0;
12357ac9a364SKalle Valo
12367ac9a364SKalle Valo if (is_green)
12377ac9a364SKalle Valo tbl->is_SGI = 0; /*11n spec: no SGI in SISO+Greenfield */
12387ac9a364SKalle Valo
12397ac9a364SKalle Valo il4965_rs_set_expected_tpt_table(lq_sta, tbl);
12407ac9a364SKalle Valo rate = il4965_rs_get_best_rate(il, lq_sta, tbl, rate_mask, idx);
12417ac9a364SKalle Valo
12427ac9a364SKalle Valo D_RATE("LQ: get best rate %d mask %X\n", rate, rate_mask);
12437ac9a364SKalle Valo if (rate == RATE_INVALID || !((1 << rate) & rate_mask)) {
12447ac9a364SKalle Valo D_RATE("can not switch with idx %d rate mask %x\n", rate,
12457ac9a364SKalle Valo rate_mask);
12467ac9a364SKalle Valo return -1;
12477ac9a364SKalle Valo }
12487ac9a364SKalle Valo tbl->current_rate =
12497ac9a364SKalle Valo il4965_rate_n_flags_from_tbl(il, tbl, rate, is_green);
12507ac9a364SKalle Valo D_RATE("LQ: Switch to new mcs %X idx is green %X\n", tbl->current_rate,
12517ac9a364SKalle Valo is_green);
12527ac9a364SKalle Valo return 0;
12537ac9a364SKalle Valo }
12547ac9a364SKalle Valo
12557ac9a364SKalle Valo /*
12567ac9a364SKalle Valo * Try to switch to new modulation mode from legacy
12577ac9a364SKalle Valo */
12587ac9a364SKalle Valo static int
il4965_rs_move_legacy_other(struct il_priv * il,struct il_lq_sta * lq_sta,struct ieee80211_conf * conf,struct ieee80211_sta * sta,int idx)12597ac9a364SKalle Valo il4965_rs_move_legacy_other(struct il_priv *il, struct il_lq_sta *lq_sta,
12607ac9a364SKalle Valo struct ieee80211_conf *conf,
12617ac9a364SKalle Valo struct ieee80211_sta *sta, int idx)
12627ac9a364SKalle Valo {
12637ac9a364SKalle Valo struct il_scale_tbl_info *tbl = &(lq_sta->lq_info[lq_sta->active_tbl]);
12647ac9a364SKalle Valo struct il_scale_tbl_info *search_tbl =
12657ac9a364SKalle Valo &(lq_sta->lq_info[(1 - lq_sta->active_tbl)]);
12667ac9a364SKalle Valo struct il_rate_scale_data *win = &(tbl->win[idx]);
12677ac9a364SKalle Valo u32 sz =
12687ac9a364SKalle Valo (sizeof(struct il_scale_tbl_info) -
12697ac9a364SKalle Valo (sizeof(struct il_rate_scale_data) * RATE_COUNT));
12707ac9a364SKalle Valo u8 start_action;
12717ac9a364SKalle Valo u8 valid_tx_ant = il->hw_params.valid_tx_ant;
12727ac9a364SKalle Valo u8 tx_chains_num = il->hw_params.tx_chains_num;
12737ac9a364SKalle Valo int ret = 0;
12747ac9a364SKalle Valo u8 update_search_tbl_counter = 0;
12757ac9a364SKalle Valo
12767ac9a364SKalle Valo tbl->action = IL_LEGACY_SWITCH_SISO;
12777ac9a364SKalle Valo
12787ac9a364SKalle Valo start_action = tbl->action;
12797ac9a364SKalle Valo for (;;) {
12807ac9a364SKalle Valo lq_sta->action_counter++;
12817ac9a364SKalle Valo switch (tbl->action) {
12827ac9a364SKalle Valo case IL_LEGACY_SWITCH_ANTENNA1:
12837ac9a364SKalle Valo case IL_LEGACY_SWITCH_ANTENNA2:
12847ac9a364SKalle Valo D_RATE("LQ: Legacy toggle Antenna\n");
12857ac9a364SKalle Valo
12867ac9a364SKalle Valo if ((tbl->action == IL_LEGACY_SWITCH_ANTENNA1 &&
12877ac9a364SKalle Valo tx_chains_num <= 1) ||
12887ac9a364SKalle Valo (tbl->action == IL_LEGACY_SWITCH_ANTENNA2 &&
12897ac9a364SKalle Valo tx_chains_num <= 2))
12907ac9a364SKalle Valo break;
12917ac9a364SKalle Valo
12927ac9a364SKalle Valo /* Don't change antenna if success has been great */
12937ac9a364SKalle Valo if (win->success_ratio >= IL_RS_GOOD_RATIO)
12947ac9a364SKalle Valo break;
12957ac9a364SKalle Valo
12967ac9a364SKalle Valo /* Set up search table to try other antenna */
12977ac9a364SKalle Valo memcpy(search_tbl, tbl, sz);
12987ac9a364SKalle Valo
12997ac9a364SKalle Valo if (il4965_rs_toggle_antenna
13007ac9a364SKalle Valo (valid_tx_ant, &search_tbl->current_rate,
13017ac9a364SKalle Valo search_tbl)) {
13027ac9a364SKalle Valo update_search_tbl_counter = 1;
13037ac9a364SKalle Valo il4965_rs_set_expected_tpt_table(lq_sta,
13047ac9a364SKalle Valo search_tbl);
13057ac9a364SKalle Valo goto out;
13067ac9a364SKalle Valo }
13077ac9a364SKalle Valo break;
13087ac9a364SKalle Valo case IL_LEGACY_SWITCH_SISO:
13097ac9a364SKalle Valo D_RATE("LQ: Legacy switch to SISO\n");
13107ac9a364SKalle Valo
13117ac9a364SKalle Valo /* Set up search table to try SISO */
13127ac9a364SKalle Valo memcpy(search_tbl, tbl, sz);
13137ac9a364SKalle Valo search_tbl->is_SGI = 0;
13147ac9a364SKalle Valo ret =
13157ac9a364SKalle Valo il4965_rs_switch_to_siso(il, lq_sta, conf, sta,
13167ac9a364SKalle Valo search_tbl, idx);
13177ac9a364SKalle Valo if (!ret) {
13187ac9a364SKalle Valo lq_sta->action_counter = 0;
13197ac9a364SKalle Valo goto out;
13207ac9a364SKalle Valo }
13217ac9a364SKalle Valo
13227ac9a364SKalle Valo break;
13237ac9a364SKalle Valo case IL_LEGACY_SWITCH_MIMO2_AB:
13247ac9a364SKalle Valo case IL_LEGACY_SWITCH_MIMO2_AC:
13257ac9a364SKalle Valo case IL_LEGACY_SWITCH_MIMO2_BC:
13267ac9a364SKalle Valo D_RATE("LQ: Legacy switch to MIMO2\n");
13277ac9a364SKalle Valo
13287ac9a364SKalle Valo /* Set up search table to try MIMO */
13297ac9a364SKalle Valo memcpy(search_tbl, tbl, sz);
13307ac9a364SKalle Valo search_tbl->is_SGI = 0;
13317ac9a364SKalle Valo
13327ac9a364SKalle Valo if (tbl->action == IL_LEGACY_SWITCH_MIMO2_AB)
13337ac9a364SKalle Valo search_tbl->ant_type = ANT_AB;
13347ac9a364SKalle Valo else if (tbl->action == IL_LEGACY_SWITCH_MIMO2_AC)
13357ac9a364SKalle Valo search_tbl->ant_type = ANT_AC;
13367ac9a364SKalle Valo else
13377ac9a364SKalle Valo search_tbl->ant_type = ANT_BC;
13387ac9a364SKalle Valo
13397ac9a364SKalle Valo if (!il4965_rs_is_valid_ant
13407ac9a364SKalle Valo (valid_tx_ant, search_tbl->ant_type))
13417ac9a364SKalle Valo break;
13427ac9a364SKalle Valo
13437ac9a364SKalle Valo ret =
13447ac9a364SKalle Valo il4965_rs_switch_to_mimo2(il, lq_sta, conf, sta,
13457ac9a364SKalle Valo search_tbl, idx);
13467ac9a364SKalle Valo if (!ret) {
13477ac9a364SKalle Valo lq_sta->action_counter = 0;
13487ac9a364SKalle Valo goto out;
13497ac9a364SKalle Valo }
13507ac9a364SKalle Valo break;
13517ac9a364SKalle Valo }
13527ac9a364SKalle Valo tbl->action++;
13537ac9a364SKalle Valo if (tbl->action > IL_LEGACY_SWITCH_MIMO2_BC)
13547ac9a364SKalle Valo tbl->action = IL_LEGACY_SWITCH_ANTENNA1;
13557ac9a364SKalle Valo
13567ac9a364SKalle Valo if (tbl->action == start_action)
13577ac9a364SKalle Valo break;
13587ac9a364SKalle Valo
13597ac9a364SKalle Valo }
13607ac9a364SKalle Valo search_tbl->lq_type = LQ_NONE;
13617ac9a364SKalle Valo return 0;
13627ac9a364SKalle Valo
13637ac9a364SKalle Valo out:
13647ac9a364SKalle Valo lq_sta->search_better_tbl = 1;
13657ac9a364SKalle Valo tbl->action++;
13667ac9a364SKalle Valo if (tbl->action > IL_LEGACY_SWITCH_MIMO2_BC)
13677ac9a364SKalle Valo tbl->action = IL_LEGACY_SWITCH_ANTENNA1;
13687ac9a364SKalle Valo if (update_search_tbl_counter)
13697ac9a364SKalle Valo search_tbl->action = tbl->action;
13707ac9a364SKalle Valo return 0;
13717ac9a364SKalle Valo
13727ac9a364SKalle Valo }
13737ac9a364SKalle Valo
13747ac9a364SKalle Valo /*
13757ac9a364SKalle Valo * Try to switch to new modulation mode from SISO
13767ac9a364SKalle Valo */
13777ac9a364SKalle Valo static int
il4965_rs_move_siso_to_other(struct il_priv * il,struct il_lq_sta * lq_sta,struct ieee80211_conf * conf,struct ieee80211_sta * sta,int idx)13787ac9a364SKalle Valo il4965_rs_move_siso_to_other(struct il_priv *il, struct il_lq_sta *lq_sta,
13797ac9a364SKalle Valo struct ieee80211_conf *conf,
13807ac9a364SKalle Valo struct ieee80211_sta *sta, int idx)
13817ac9a364SKalle Valo {
13827ac9a364SKalle Valo u8 is_green = lq_sta->is_green;
13837ac9a364SKalle Valo struct il_scale_tbl_info *tbl = &(lq_sta->lq_info[lq_sta->active_tbl]);
13847ac9a364SKalle Valo struct il_scale_tbl_info *search_tbl =
13857ac9a364SKalle Valo &(lq_sta->lq_info[(1 - lq_sta->active_tbl)]);
13867ac9a364SKalle Valo struct il_rate_scale_data *win = &(tbl->win[idx]);
1387046d2e7cSSriram R struct ieee80211_sta_ht_cap *ht_cap = &sta->deflink.ht_cap;
13887ac9a364SKalle Valo u32 sz =
13897ac9a364SKalle Valo (sizeof(struct il_scale_tbl_info) -
13907ac9a364SKalle Valo (sizeof(struct il_rate_scale_data) * RATE_COUNT));
13917ac9a364SKalle Valo u8 start_action;
13927ac9a364SKalle Valo u8 valid_tx_ant = il->hw_params.valid_tx_ant;
13937ac9a364SKalle Valo u8 tx_chains_num = il->hw_params.tx_chains_num;
13947ac9a364SKalle Valo u8 update_search_tbl_counter = 0;
13957ac9a364SKalle Valo int ret;
13967ac9a364SKalle Valo
13977ac9a364SKalle Valo start_action = tbl->action;
13987ac9a364SKalle Valo
13997ac9a364SKalle Valo for (;;) {
14007ac9a364SKalle Valo lq_sta->action_counter++;
14017ac9a364SKalle Valo switch (tbl->action) {
14027ac9a364SKalle Valo case IL_SISO_SWITCH_ANTENNA1:
14037ac9a364SKalle Valo case IL_SISO_SWITCH_ANTENNA2:
14047ac9a364SKalle Valo D_RATE("LQ: SISO toggle Antenna\n");
14057ac9a364SKalle Valo if ((tbl->action == IL_SISO_SWITCH_ANTENNA1 &&
14067ac9a364SKalle Valo tx_chains_num <= 1) ||
14077ac9a364SKalle Valo (tbl->action == IL_SISO_SWITCH_ANTENNA2 &&
14087ac9a364SKalle Valo tx_chains_num <= 2))
14097ac9a364SKalle Valo break;
14107ac9a364SKalle Valo
14117ac9a364SKalle Valo if (win->success_ratio >= IL_RS_GOOD_RATIO)
14127ac9a364SKalle Valo break;
14137ac9a364SKalle Valo
14147ac9a364SKalle Valo memcpy(search_tbl, tbl, sz);
14157ac9a364SKalle Valo if (il4965_rs_toggle_antenna
14167ac9a364SKalle Valo (valid_tx_ant, &search_tbl->current_rate,
14177ac9a364SKalle Valo search_tbl)) {
14187ac9a364SKalle Valo update_search_tbl_counter = 1;
14197ac9a364SKalle Valo goto out;
14207ac9a364SKalle Valo }
14217ac9a364SKalle Valo break;
14227ac9a364SKalle Valo case IL_SISO_SWITCH_MIMO2_AB:
14237ac9a364SKalle Valo case IL_SISO_SWITCH_MIMO2_AC:
14247ac9a364SKalle Valo case IL_SISO_SWITCH_MIMO2_BC:
14257ac9a364SKalle Valo D_RATE("LQ: SISO switch to MIMO2\n");
14267ac9a364SKalle Valo memcpy(search_tbl, tbl, sz);
14277ac9a364SKalle Valo search_tbl->is_SGI = 0;
14287ac9a364SKalle Valo
14297ac9a364SKalle Valo if (tbl->action == IL_SISO_SWITCH_MIMO2_AB)
14307ac9a364SKalle Valo search_tbl->ant_type = ANT_AB;
14317ac9a364SKalle Valo else if (tbl->action == IL_SISO_SWITCH_MIMO2_AC)
14327ac9a364SKalle Valo search_tbl->ant_type = ANT_AC;
14337ac9a364SKalle Valo else
14347ac9a364SKalle Valo search_tbl->ant_type = ANT_BC;
14357ac9a364SKalle Valo
14367ac9a364SKalle Valo if (!il4965_rs_is_valid_ant
14377ac9a364SKalle Valo (valid_tx_ant, search_tbl->ant_type))
14387ac9a364SKalle Valo break;
14397ac9a364SKalle Valo
14407ac9a364SKalle Valo ret =
14417ac9a364SKalle Valo il4965_rs_switch_to_mimo2(il, lq_sta, conf, sta,
14427ac9a364SKalle Valo search_tbl, idx);
14437ac9a364SKalle Valo if (!ret)
14447ac9a364SKalle Valo goto out;
14457ac9a364SKalle Valo break;
14467ac9a364SKalle Valo case IL_SISO_SWITCH_GI:
14477ac9a364SKalle Valo if (!tbl->is_ht40 &&
14487ac9a364SKalle Valo !(ht_cap->cap & IEEE80211_HT_CAP_SGI_20))
14497ac9a364SKalle Valo break;
14507ac9a364SKalle Valo if (tbl->is_ht40 &&
14517ac9a364SKalle Valo !(ht_cap->cap & IEEE80211_HT_CAP_SGI_40))
14527ac9a364SKalle Valo break;
14537ac9a364SKalle Valo
14547ac9a364SKalle Valo D_RATE("LQ: SISO toggle SGI/NGI\n");
14557ac9a364SKalle Valo
14567ac9a364SKalle Valo memcpy(search_tbl, tbl, sz);
14577ac9a364SKalle Valo if (is_green) {
14587ac9a364SKalle Valo if (!tbl->is_SGI)
14597ac9a364SKalle Valo break;
14607ac9a364SKalle Valo else
14617ac9a364SKalle Valo IL_ERR("SGI was set in GF+SISO\n");
14627ac9a364SKalle Valo }
14637ac9a364SKalle Valo search_tbl->is_SGI = !tbl->is_SGI;
14647ac9a364SKalle Valo il4965_rs_set_expected_tpt_table(lq_sta, search_tbl);
14657ac9a364SKalle Valo if (tbl->is_SGI) {
14667ac9a364SKalle Valo s32 tpt = lq_sta->last_tpt / 100;
14677ac9a364SKalle Valo if (tpt >= search_tbl->expected_tpt[idx])
14687ac9a364SKalle Valo break;
14697ac9a364SKalle Valo }
14707ac9a364SKalle Valo search_tbl->current_rate =
14717ac9a364SKalle Valo il4965_rate_n_flags_from_tbl(il, search_tbl, idx,
14727ac9a364SKalle Valo is_green);
14737ac9a364SKalle Valo update_search_tbl_counter = 1;
14747ac9a364SKalle Valo goto out;
14757ac9a364SKalle Valo }
14767ac9a364SKalle Valo tbl->action++;
14777ac9a364SKalle Valo if (tbl->action > IL_SISO_SWITCH_GI)
14787ac9a364SKalle Valo tbl->action = IL_SISO_SWITCH_ANTENNA1;
14797ac9a364SKalle Valo
14807ac9a364SKalle Valo if (tbl->action == start_action)
14817ac9a364SKalle Valo break;
14827ac9a364SKalle Valo }
14837ac9a364SKalle Valo search_tbl->lq_type = LQ_NONE;
14847ac9a364SKalle Valo return 0;
14857ac9a364SKalle Valo
14867ac9a364SKalle Valo out:
14877ac9a364SKalle Valo lq_sta->search_better_tbl = 1;
14887ac9a364SKalle Valo tbl->action++;
14897ac9a364SKalle Valo if (tbl->action > IL_SISO_SWITCH_GI)
14907ac9a364SKalle Valo tbl->action = IL_SISO_SWITCH_ANTENNA1;
14917ac9a364SKalle Valo if (update_search_tbl_counter)
14927ac9a364SKalle Valo search_tbl->action = tbl->action;
14937ac9a364SKalle Valo
14947ac9a364SKalle Valo return 0;
14957ac9a364SKalle Valo }
14967ac9a364SKalle Valo
14977ac9a364SKalle Valo /*
14987ac9a364SKalle Valo * Try to switch to new modulation mode from MIMO2
14997ac9a364SKalle Valo */
15007ac9a364SKalle Valo static int
il4965_rs_move_mimo2_to_other(struct il_priv * il,struct il_lq_sta * lq_sta,struct ieee80211_conf * conf,struct ieee80211_sta * sta,int idx)15017ac9a364SKalle Valo il4965_rs_move_mimo2_to_other(struct il_priv *il, struct il_lq_sta *lq_sta,
15027ac9a364SKalle Valo struct ieee80211_conf *conf,
15037ac9a364SKalle Valo struct ieee80211_sta *sta, int idx)
15047ac9a364SKalle Valo {
15057ac9a364SKalle Valo s8 is_green = lq_sta->is_green;
15067ac9a364SKalle Valo struct il_scale_tbl_info *tbl = &(lq_sta->lq_info[lq_sta->active_tbl]);
15077ac9a364SKalle Valo struct il_scale_tbl_info *search_tbl =
15087ac9a364SKalle Valo &(lq_sta->lq_info[(1 - lq_sta->active_tbl)]);
15097ac9a364SKalle Valo struct il_rate_scale_data *win = &(tbl->win[idx]);
1510046d2e7cSSriram R struct ieee80211_sta_ht_cap *ht_cap = &sta->deflink.ht_cap;
15117ac9a364SKalle Valo u32 sz =
15127ac9a364SKalle Valo (sizeof(struct il_scale_tbl_info) -
15137ac9a364SKalle Valo (sizeof(struct il_rate_scale_data) * RATE_COUNT));
15147ac9a364SKalle Valo u8 start_action;
15157ac9a364SKalle Valo u8 valid_tx_ant = il->hw_params.valid_tx_ant;
15167ac9a364SKalle Valo u8 tx_chains_num = il->hw_params.tx_chains_num;
15177ac9a364SKalle Valo u8 update_search_tbl_counter = 0;
15187ac9a364SKalle Valo int ret;
15197ac9a364SKalle Valo
15207ac9a364SKalle Valo start_action = tbl->action;
15217ac9a364SKalle Valo for (;;) {
15227ac9a364SKalle Valo lq_sta->action_counter++;
15237ac9a364SKalle Valo switch (tbl->action) {
15247ac9a364SKalle Valo case IL_MIMO2_SWITCH_ANTENNA1:
15257ac9a364SKalle Valo case IL_MIMO2_SWITCH_ANTENNA2:
15267ac9a364SKalle Valo D_RATE("LQ: MIMO2 toggle Antennas\n");
15277ac9a364SKalle Valo
15287ac9a364SKalle Valo if (tx_chains_num <= 2)
15297ac9a364SKalle Valo break;
15307ac9a364SKalle Valo
15317ac9a364SKalle Valo if (win->success_ratio >= IL_RS_GOOD_RATIO)
15327ac9a364SKalle Valo break;
15337ac9a364SKalle Valo
15347ac9a364SKalle Valo memcpy(search_tbl, tbl, sz);
15357ac9a364SKalle Valo if (il4965_rs_toggle_antenna
15367ac9a364SKalle Valo (valid_tx_ant, &search_tbl->current_rate,
15377ac9a364SKalle Valo search_tbl)) {
15387ac9a364SKalle Valo update_search_tbl_counter = 1;
15397ac9a364SKalle Valo goto out;
15407ac9a364SKalle Valo }
15417ac9a364SKalle Valo break;
15427ac9a364SKalle Valo case IL_MIMO2_SWITCH_SISO_A:
15437ac9a364SKalle Valo case IL_MIMO2_SWITCH_SISO_B:
15447ac9a364SKalle Valo case IL_MIMO2_SWITCH_SISO_C:
15457ac9a364SKalle Valo D_RATE("LQ: MIMO2 switch to SISO\n");
15467ac9a364SKalle Valo
15477ac9a364SKalle Valo /* Set up new search table for SISO */
15487ac9a364SKalle Valo memcpy(search_tbl, tbl, sz);
15497ac9a364SKalle Valo
15507ac9a364SKalle Valo if (tbl->action == IL_MIMO2_SWITCH_SISO_A)
15517ac9a364SKalle Valo search_tbl->ant_type = ANT_A;
15527ac9a364SKalle Valo else if (tbl->action == IL_MIMO2_SWITCH_SISO_B)
15537ac9a364SKalle Valo search_tbl->ant_type = ANT_B;
15547ac9a364SKalle Valo else
15557ac9a364SKalle Valo search_tbl->ant_type = ANT_C;
15567ac9a364SKalle Valo
15577ac9a364SKalle Valo if (!il4965_rs_is_valid_ant
15587ac9a364SKalle Valo (valid_tx_ant, search_tbl->ant_type))
15597ac9a364SKalle Valo break;
15607ac9a364SKalle Valo
15617ac9a364SKalle Valo ret =
15627ac9a364SKalle Valo il4965_rs_switch_to_siso(il, lq_sta, conf, sta,
15637ac9a364SKalle Valo search_tbl, idx);
15647ac9a364SKalle Valo if (!ret)
15657ac9a364SKalle Valo goto out;
15667ac9a364SKalle Valo
15677ac9a364SKalle Valo break;
15687ac9a364SKalle Valo
15697ac9a364SKalle Valo case IL_MIMO2_SWITCH_GI:
15707ac9a364SKalle Valo if (!tbl->is_ht40 &&
15717ac9a364SKalle Valo !(ht_cap->cap & IEEE80211_HT_CAP_SGI_20))
15727ac9a364SKalle Valo break;
15737ac9a364SKalle Valo if (tbl->is_ht40 &&
15747ac9a364SKalle Valo !(ht_cap->cap & IEEE80211_HT_CAP_SGI_40))
15757ac9a364SKalle Valo break;
15767ac9a364SKalle Valo
15777ac9a364SKalle Valo D_RATE("LQ: MIMO2 toggle SGI/NGI\n");
15787ac9a364SKalle Valo
15797ac9a364SKalle Valo /* Set up new search table for MIMO2 */
15807ac9a364SKalle Valo memcpy(search_tbl, tbl, sz);
15817ac9a364SKalle Valo search_tbl->is_SGI = !tbl->is_SGI;
15827ac9a364SKalle Valo il4965_rs_set_expected_tpt_table(lq_sta, search_tbl);
15837ac9a364SKalle Valo /*
15847ac9a364SKalle Valo * If active table already uses the fastest possible
15857ac9a364SKalle Valo * modulation (dual stream with short guard interval),
15867ac9a364SKalle Valo * and it's working well, there's no need to look
15877ac9a364SKalle Valo * for a better type of modulation!
15887ac9a364SKalle Valo */
15897ac9a364SKalle Valo if (tbl->is_SGI) {
15907ac9a364SKalle Valo s32 tpt = lq_sta->last_tpt / 100;
15917ac9a364SKalle Valo if (tpt >= search_tbl->expected_tpt[idx])
15927ac9a364SKalle Valo break;
15937ac9a364SKalle Valo }
15947ac9a364SKalle Valo search_tbl->current_rate =
15957ac9a364SKalle Valo il4965_rate_n_flags_from_tbl(il, search_tbl, idx,
15967ac9a364SKalle Valo is_green);
15977ac9a364SKalle Valo update_search_tbl_counter = 1;
15987ac9a364SKalle Valo goto out;
15997ac9a364SKalle Valo
16007ac9a364SKalle Valo }
16017ac9a364SKalle Valo tbl->action++;
16027ac9a364SKalle Valo if (tbl->action > IL_MIMO2_SWITCH_GI)
16037ac9a364SKalle Valo tbl->action = IL_MIMO2_SWITCH_ANTENNA1;
16047ac9a364SKalle Valo
16057ac9a364SKalle Valo if (tbl->action == start_action)
16067ac9a364SKalle Valo break;
16077ac9a364SKalle Valo }
16087ac9a364SKalle Valo search_tbl->lq_type = LQ_NONE;
16097ac9a364SKalle Valo return 0;
16107ac9a364SKalle Valo out:
16117ac9a364SKalle Valo lq_sta->search_better_tbl = 1;
16127ac9a364SKalle Valo tbl->action++;
16137ac9a364SKalle Valo if (tbl->action > IL_MIMO2_SWITCH_GI)
16147ac9a364SKalle Valo tbl->action = IL_MIMO2_SWITCH_ANTENNA1;
16157ac9a364SKalle Valo if (update_search_tbl_counter)
16167ac9a364SKalle Valo search_tbl->action = tbl->action;
16177ac9a364SKalle Valo
16187ac9a364SKalle Valo return 0;
16197ac9a364SKalle Valo
16207ac9a364SKalle Valo }
16217ac9a364SKalle Valo
16227ac9a364SKalle Valo /*
16237ac9a364SKalle Valo * Check whether we should continue using same modulation mode, or
16247ac9a364SKalle Valo * begin search for a new mode, based on:
16257ac9a364SKalle Valo * 1) # tx successes or failures while using this mode
16267ac9a364SKalle Valo * 2) # times calling this function
16277ac9a364SKalle Valo * 3) elapsed time in this mode (not used, for now)
16287ac9a364SKalle Valo */
16297ac9a364SKalle Valo static void
il4965_rs_stay_in_table(struct il_lq_sta * lq_sta,bool force_search)16307ac9a364SKalle Valo il4965_rs_stay_in_table(struct il_lq_sta *lq_sta, bool force_search)
16317ac9a364SKalle Valo {
16327ac9a364SKalle Valo struct il_scale_tbl_info *tbl;
16337ac9a364SKalle Valo int i;
16347ac9a364SKalle Valo int active_tbl;
16357ac9a364SKalle Valo int flush_interval_passed = 0;
16367ac9a364SKalle Valo struct il_priv *il;
16377ac9a364SKalle Valo
16387ac9a364SKalle Valo il = lq_sta->drv;
16397ac9a364SKalle Valo active_tbl = lq_sta->active_tbl;
16407ac9a364SKalle Valo
16417ac9a364SKalle Valo tbl = &(lq_sta->lq_info[active_tbl]);
16427ac9a364SKalle Valo
16437ac9a364SKalle Valo /* If we've been disallowing search, see if we should now allow it */
16447ac9a364SKalle Valo if (lq_sta->stay_in_tbl) {
16457ac9a364SKalle Valo
16467ac9a364SKalle Valo /* Elapsed time using current modulation mode */
16477ac9a364SKalle Valo if (lq_sta->flush_timer)
16487ac9a364SKalle Valo flush_interval_passed =
16497ac9a364SKalle Valo time_after(jiffies,
16507ac9a364SKalle Valo (unsigned long)(lq_sta->flush_timer +
16517ac9a364SKalle Valo RATE_SCALE_FLUSH_INTVL));
16527ac9a364SKalle Valo
16537ac9a364SKalle Valo /*
16547ac9a364SKalle Valo * Check if we should allow search for new modulation mode.
16557ac9a364SKalle Valo * If many frames have failed or succeeded, or we've used
16567ac9a364SKalle Valo * this same modulation for a long time, allow search, and
16577ac9a364SKalle Valo * reset history stats that keep track of whether we should
16587ac9a364SKalle Valo * allow a new search. Also (below) reset all bitmaps and
16597ac9a364SKalle Valo * stats in active history.
16607ac9a364SKalle Valo */
16617ac9a364SKalle Valo if (force_search ||
16627ac9a364SKalle Valo lq_sta->total_failed > lq_sta->max_failure_limit ||
16637ac9a364SKalle Valo lq_sta->total_success > lq_sta->max_success_limit ||
16647ac9a364SKalle Valo (!lq_sta->search_better_tbl && lq_sta->flush_timer &&
16657ac9a364SKalle Valo flush_interval_passed)) {
16667ac9a364SKalle Valo D_RATE("LQ: stay is expired %d %d %d\n",
16677ac9a364SKalle Valo lq_sta->total_failed, lq_sta->total_success,
16687ac9a364SKalle Valo flush_interval_passed);
16697ac9a364SKalle Valo
16707ac9a364SKalle Valo /* Allow search for new mode */
16717ac9a364SKalle Valo lq_sta->stay_in_tbl = 0; /* only place reset */
16727ac9a364SKalle Valo lq_sta->total_failed = 0;
16737ac9a364SKalle Valo lq_sta->total_success = 0;
16747ac9a364SKalle Valo lq_sta->flush_timer = 0;
16757ac9a364SKalle Valo
16767ac9a364SKalle Valo /*
16777ac9a364SKalle Valo * Else if we've used this modulation mode enough repetitions
16787ac9a364SKalle Valo * (regardless of elapsed time or success/failure), reset
16797ac9a364SKalle Valo * history bitmaps and rate-specific stats for all rates in
16807ac9a364SKalle Valo * active table.
16817ac9a364SKalle Valo */
16827ac9a364SKalle Valo } else {
16837ac9a364SKalle Valo lq_sta->table_count++;
16847ac9a364SKalle Valo if (lq_sta->table_count >= lq_sta->table_count_limit) {
16857ac9a364SKalle Valo lq_sta->table_count = 0;
16867ac9a364SKalle Valo
16877ac9a364SKalle Valo D_RATE("LQ: stay in table clear win\n");
16887ac9a364SKalle Valo for (i = 0; i < RATE_COUNT; i++)
16897ac9a364SKalle Valo il4965_rs_rate_scale_clear_win(&
16907ac9a364SKalle Valo (tbl->
16917ac9a364SKalle Valo win
16927ac9a364SKalle Valo [i]));
16937ac9a364SKalle Valo }
16947ac9a364SKalle Valo }
16957ac9a364SKalle Valo
16967ac9a364SKalle Valo /* If transitioning to allow "search", reset all history
16977ac9a364SKalle Valo * bitmaps and stats in active table (this will become the new
16987ac9a364SKalle Valo * "search" table). */
16997ac9a364SKalle Valo if (!lq_sta->stay_in_tbl) {
17007ac9a364SKalle Valo for (i = 0; i < RATE_COUNT; i++)
17017ac9a364SKalle Valo il4965_rs_rate_scale_clear_win(&(tbl->win[i]));
17027ac9a364SKalle Valo }
17037ac9a364SKalle Valo }
17047ac9a364SKalle Valo }
17057ac9a364SKalle Valo
17067ac9a364SKalle Valo /*
17077ac9a364SKalle Valo * setup rate table in uCode
17087ac9a364SKalle Valo */
17097ac9a364SKalle Valo static void
il4965_rs_update_rate_tbl(struct il_priv * il,struct il_lq_sta * lq_sta,struct il_scale_tbl_info * tbl,int idx,u8 is_green)17107ac9a364SKalle Valo il4965_rs_update_rate_tbl(struct il_priv *il, struct il_lq_sta *lq_sta,
17117ac9a364SKalle Valo struct il_scale_tbl_info *tbl, int idx, u8 is_green)
17127ac9a364SKalle Valo {
17137ac9a364SKalle Valo u32 rate;
17147ac9a364SKalle Valo
17157ac9a364SKalle Valo /* Update uCode's rate table. */
17167ac9a364SKalle Valo rate = il4965_rate_n_flags_from_tbl(il, tbl, idx, is_green);
17177ac9a364SKalle Valo il4965_rs_fill_link_cmd(il, lq_sta, rate);
17187ac9a364SKalle Valo il_send_lq_cmd(il, &lq_sta->lq, CMD_ASYNC, false);
17197ac9a364SKalle Valo }
17207ac9a364SKalle Valo
17217ac9a364SKalle Valo /*
17227ac9a364SKalle Valo * Do rate scaling and search for new modulation mode.
17237ac9a364SKalle Valo */
17247ac9a364SKalle Valo static void
il4965_rs_rate_scale_perform(struct il_priv * il,struct sk_buff * skb,struct ieee80211_sta * sta,struct il_lq_sta * lq_sta)17257ac9a364SKalle Valo il4965_rs_rate_scale_perform(struct il_priv *il, struct sk_buff *skb,
17267ac9a364SKalle Valo struct ieee80211_sta *sta,
17277ac9a364SKalle Valo struct il_lq_sta *lq_sta)
17287ac9a364SKalle Valo {
17297ac9a364SKalle Valo struct ieee80211_hw *hw = il->hw;
17307ac9a364SKalle Valo struct ieee80211_conf *conf = &hw->conf;
17317ac9a364SKalle Valo struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
17327ac9a364SKalle Valo struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
17337ac9a364SKalle Valo int low = RATE_INVALID;
17347ac9a364SKalle Valo int high = RATE_INVALID;
17357ac9a364SKalle Valo int idx;
17367ac9a364SKalle Valo int i;
17377ac9a364SKalle Valo struct il_rate_scale_data *win = NULL;
17387ac9a364SKalle Valo int current_tpt = IL_INVALID_VALUE;
17397ac9a364SKalle Valo int low_tpt = IL_INVALID_VALUE;
17407ac9a364SKalle Valo int high_tpt = IL_INVALID_VALUE;
17417ac9a364SKalle Valo u32 fail_count;
17427ac9a364SKalle Valo s8 scale_action = 0;
17437ac9a364SKalle Valo u16 rate_mask;
17447ac9a364SKalle Valo u8 update_lq = 0;
17457ac9a364SKalle Valo struct il_scale_tbl_info *tbl, *tbl1;
17467ac9a364SKalle Valo u16 rate_scale_idx_msk = 0;
17477ac9a364SKalle Valo u8 is_green = 0;
17487ac9a364SKalle Valo u8 active_tbl = 0;
17497ac9a364SKalle Valo u8 done_search = 0;
17507ac9a364SKalle Valo u16 high_low;
17517ac9a364SKalle Valo s32 sr;
1752ddfa943fSColin Ian King u8 tid;
17537ac9a364SKalle Valo struct il_tid_data *tid_data;
17547ac9a364SKalle Valo
17557ac9a364SKalle Valo D_RATE("rate scale calculate new rate for skb\n");
17567ac9a364SKalle Valo
17577ac9a364SKalle Valo /* Send management frames and NO_ACK data using lowest rate. */
17587ac9a364SKalle Valo /* TODO: this could probably be improved.. */
17597ac9a364SKalle Valo if (!ieee80211_is_data(hdr->frame_control) ||
17607ac9a364SKalle Valo (info->flags & IEEE80211_TX_CTL_NO_ACK))
17617ac9a364SKalle Valo return;
17627ac9a364SKalle Valo
1763046d2e7cSSriram R lq_sta->supp_rates = sta->deflink.supp_rates[lq_sta->band];
17647ac9a364SKalle Valo
17657ac9a364SKalle Valo tid = il4965_rs_tl_add_packet(lq_sta, hdr);
17667ac9a364SKalle Valo if (tid != MAX_TID_COUNT && (lq_sta->tx_agg_tid_en & (1 << tid))) {
17677ac9a364SKalle Valo tid_data = &il->stations[lq_sta->lq.sta_id].tid[tid];
17687ac9a364SKalle Valo if (tid_data->agg.state == IL_AGG_OFF)
17697ac9a364SKalle Valo lq_sta->is_agg = 0;
17707ac9a364SKalle Valo else
17717ac9a364SKalle Valo lq_sta->is_agg = 1;
17727ac9a364SKalle Valo } else
17737ac9a364SKalle Valo lq_sta->is_agg = 0;
17747ac9a364SKalle Valo
17757ac9a364SKalle Valo /*
17767ac9a364SKalle Valo * Select rate-scale / modulation-mode table to work with in
17777ac9a364SKalle Valo * the rest of this function: "search" if searching for better
17787ac9a364SKalle Valo * modulation mode, or "active" if doing rate scaling within a mode.
17797ac9a364SKalle Valo */
17807ac9a364SKalle Valo if (!lq_sta->search_better_tbl)
17817ac9a364SKalle Valo active_tbl = lq_sta->active_tbl;
17827ac9a364SKalle Valo else
17837ac9a364SKalle Valo active_tbl = 1 - lq_sta->active_tbl;
17847ac9a364SKalle Valo
17857ac9a364SKalle Valo tbl = &(lq_sta->lq_info[active_tbl]);
17867ac9a364SKalle Valo if (is_legacy(tbl->lq_type))
17877ac9a364SKalle Valo lq_sta->is_green = 0;
17887ac9a364SKalle Valo else
17897ac9a364SKalle Valo lq_sta->is_green = il4965_rs_use_green(il, sta);
17907ac9a364SKalle Valo is_green = lq_sta->is_green;
17917ac9a364SKalle Valo
17927ac9a364SKalle Valo /* current tx rate */
17937ac9a364SKalle Valo idx = lq_sta->last_txrate_idx;
17947ac9a364SKalle Valo
17957ac9a364SKalle Valo D_RATE("Rate scale idx %d for type %d\n", idx, tbl->lq_type);
17967ac9a364SKalle Valo
17977ac9a364SKalle Valo /* rates available for this association, and for modulation mode */
17987ac9a364SKalle Valo rate_mask = il4965_rs_get_supported_rates(lq_sta, hdr, tbl->lq_type);
17997ac9a364SKalle Valo
18007ac9a364SKalle Valo D_RATE("mask 0x%04X\n", rate_mask);
18017ac9a364SKalle Valo
18027ac9a364SKalle Valo /* mask with station rate restriction */
18037ac9a364SKalle Valo if (is_legacy(tbl->lq_type)) {
180457fbcce3SJohannes Berg if (lq_sta->band == NL80211_BAND_5GHZ)
18057ac9a364SKalle Valo /* supp_rates has no CCK bits in A mode */
18067ac9a364SKalle Valo rate_scale_idx_msk =
18077ac9a364SKalle Valo (u16) (rate_mask &
18087ac9a364SKalle Valo (lq_sta->supp_rates << IL_FIRST_OFDM_RATE));
18097ac9a364SKalle Valo else
18107ac9a364SKalle Valo rate_scale_idx_msk =
18117ac9a364SKalle Valo (u16) (rate_mask & lq_sta->supp_rates);
18127ac9a364SKalle Valo
18137ac9a364SKalle Valo } else
18147ac9a364SKalle Valo rate_scale_idx_msk = rate_mask;
18157ac9a364SKalle Valo
18167ac9a364SKalle Valo if (!rate_scale_idx_msk)
18177ac9a364SKalle Valo rate_scale_idx_msk = rate_mask;
18187ac9a364SKalle Valo
18197ac9a364SKalle Valo if (!((1 << idx) & rate_scale_idx_msk)) {
18207ac9a364SKalle Valo IL_ERR("Current Rate is not valid\n");
18217ac9a364SKalle Valo if (lq_sta->search_better_tbl) {
18227ac9a364SKalle Valo /* revert to active table if search table is not valid */
18237ac9a364SKalle Valo tbl->lq_type = LQ_NONE;
18247ac9a364SKalle Valo lq_sta->search_better_tbl = 0;
18257ac9a364SKalle Valo tbl = &(lq_sta->lq_info[lq_sta->active_tbl]);
18267ac9a364SKalle Valo /* get "active" rate info */
18277ac9a364SKalle Valo idx = il4965_hwrate_to_plcp_idx(tbl->current_rate);
18287ac9a364SKalle Valo il4965_rs_update_rate_tbl(il, lq_sta, tbl, idx,
18297ac9a364SKalle Valo is_green);
18307ac9a364SKalle Valo }
18317ac9a364SKalle Valo return;
18327ac9a364SKalle Valo }
18337ac9a364SKalle Valo
18347ac9a364SKalle Valo /* Get expected throughput table and history win for current rate */
18357ac9a364SKalle Valo if (!tbl->expected_tpt) {
18367ac9a364SKalle Valo IL_ERR("tbl->expected_tpt is NULL\n");
18377ac9a364SKalle Valo return;
18387ac9a364SKalle Valo }
18397ac9a364SKalle Valo
18407ac9a364SKalle Valo /* force user max rate if set by user */
18417ac9a364SKalle Valo if (lq_sta->max_rate_idx != -1 && lq_sta->max_rate_idx < idx) {
18427ac9a364SKalle Valo idx = lq_sta->max_rate_idx;
18437ac9a364SKalle Valo update_lq = 1;
18447ac9a364SKalle Valo win = &(tbl->win[idx]);
18457ac9a364SKalle Valo goto lq_update;
18467ac9a364SKalle Valo }
18477ac9a364SKalle Valo
18487ac9a364SKalle Valo win = &(tbl->win[idx]);
18497ac9a364SKalle Valo
18507ac9a364SKalle Valo /*
18517ac9a364SKalle Valo * If there is not enough history to calculate actual average
18527ac9a364SKalle Valo * throughput, keep analyzing results of more tx frames, without
18537ac9a364SKalle Valo * changing rate or mode (bypass most of the rest of this function).
18547ac9a364SKalle Valo * Set up new rate table in uCode only if old rate is not supported
18557ac9a364SKalle Valo * in current association (use new rate found above).
18567ac9a364SKalle Valo */
18577ac9a364SKalle Valo fail_count = win->counter - win->success_counter;
18587ac9a364SKalle Valo if (fail_count < RATE_MIN_FAILURE_TH &&
18597ac9a364SKalle Valo win->success_counter < RATE_MIN_SUCCESS_TH) {
18607ac9a364SKalle Valo D_RATE("LQ: still below TH. succ=%d total=%d " "for idx %d\n",
18617ac9a364SKalle Valo win->success_counter, win->counter, idx);
18627ac9a364SKalle Valo
18637ac9a364SKalle Valo /* Can't calculate this yet; not enough history */
18647ac9a364SKalle Valo win->average_tpt = IL_INVALID_VALUE;
18657ac9a364SKalle Valo
18667ac9a364SKalle Valo /* Should we stay with this modulation mode,
18677ac9a364SKalle Valo * or search for a new one? */
18687ac9a364SKalle Valo il4965_rs_stay_in_table(lq_sta, false);
18697ac9a364SKalle Valo
18707ac9a364SKalle Valo goto out;
18717ac9a364SKalle Valo }
18727ac9a364SKalle Valo /* Else we have enough samples; calculate estimate of
18737ac9a364SKalle Valo * actual average throughput */
18747ac9a364SKalle Valo if (win->average_tpt !=
18757ac9a364SKalle Valo ((win->success_ratio * tbl->expected_tpt[idx] + 64) / 128)) {
18767ac9a364SKalle Valo IL_ERR("expected_tpt should have been calculated by now\n");
18777ac9a364SKalle Valo win->average_tpt =
18787ac9a364SKalle Valo ((win->success_ratio * tbl->expected_tpt[idx] + 64) / 128);
18797ac9a364SKalle Valo }
18807ac9a364SKalle Valo
18817ac9a364SKalle Valo /* If we are searching for better modulation mode, check success. */
18827ac9a364SKalle Valo if (lq_sta->search_better_tbl) {
18837ac9a364SKalle Valo /* If good success, continue using the "search" mode;
18847ac9a364SKalle Valo * no need to send new link quality command, since we're
18857ac9a364SKalle Valo * continuing to use the setup that we've been trying. */
18867ac9a364SKalle Valo if (win->average_tpt > lq_sta->last_tpt) {
18877ac9a364SKalle Valo
18887ac9a364SKalle Valo D_RATE("LQ: SWITCHING TO NEW TBL "
18897ac9a364SKalle Valo "suc=%d cur-tpt=%d old-tpt=%d\n",
18907ac9a364SKalle Valo win->success_ratio, win->average_tpt,
18917ac9a364SKalle Valo lq_sta->last_tpt);
18927ac9a364SKalle Valo
18937ac9a364SKalle Valo if (!is_legacy(tbl->lq_type))
18947ac9a364SKalle Valo lq_sta->enable_counter = 1;
18957ac9a364SKalle Valo
18967ac9a364SKalle Valo /* Swap tables; "search" becomes "active" */
18977ac9a364SKalle Valo lq_sta->active_tbl = active_tbl;
18987ac9a364SKalle Valo current_tpt = win->average_tpt;
18997ac9a364SKalle Valo
19007ac9a364SKalle Valo /* Else poor success; go back to mode in "active" table */
19017ac9a364SKalle Valo } else {
19027ac9a364SKalle Valo
19037ac9a364SKalle Valo D_RATE("LQ: GOING BACK TO THE OLD TBL "
19047ac9a364SKalle Valo "suc=%d cur-tpt=%d old-tpt=%d\n",
19057ac9a364SKalle Valo win->success_ratio, win->average_tpt,
19067ac9a364SKalle Valo lq_sta->last_tpt);
19077ac9a364SKalle Valo
19087ac9a364SKalle Valo /* Nullify "search" table */
19097ac9a364SKalle Valo tbl->lq_type = LQ_NONE;
19107ac9a364SKalle Valo
19117ac9a364SKalle Valo /* Revert to "active" table */
19127ac9a364SKalle Valo active_tbl = lq_sta->active_tbl;
19137ac9a364SKalle Valo tbl = &(lq_sta->lq_info[active_tbl]);
19147ac9a364SKalle Valo
19157ac9a364SKalle Valo /* Revert to "active" rate and throughput info */
19167ac9a364SKalle Valo idx = il4965_hwrate_to_plcp_idx(tbl->current_rate);
19177ac9a364SKalle Valo current_tpt = lq_sta->last_tpt;
19187ac9a364SKalle Valo
19197ac9a364SKalle Valo /* Need to set up a new rate table in uCode */
19207ac9a364SKalle Valo update_lq = 1;
19217ac9a364SKalle Valo }
19227ac9a364SKalle Valo
19237ac9a364SKalle Valo /* Either way, we've made a decision; modulation mode
19247ac9a364SKalle Valo * search is done, allow rate adjustment next time. */
19257ac9a364SKalle Valo lq_sta->search_better_tbl = 0;
19267ac9a364SKalle Valo done_search = 1; /* Don't switch modes below! */
19277ac9a364SKalle Valo goto lq_update;
19287ac9a364SKalle Valo }
19297ac9a364SKalle Valo
19307ac9a364SKalle Valo /* (Else) not in search of better modulation mode, try for better
19317ac9a364SKalle Valo * starting rate, while staying in this mode. */
19327ac9a364SKalle Valo high_low =
19337ac9a364SKalle Valo il4965_rs_get_adjacent_rate(il, idx, rate_scale_idx_msk,
19347ac9a364SKalle Valo tbl->lq_type);
19357ac9a364SKalle Valo low = high_low & 0xff;
19367ac9a364SKalle Valo high = (high_low >> 8) & 0xff;
19377ac9a364SKalle Valo
19387ac9a364SKalle Valo /* If user set max rate, dont allow higher than user constrain */
19397ac9a364SKalle Valo if (lq_sta->max_rate_idx != -1 && lq_sta->max_rate_idx < high)
19407ac9a364SKalle Valo high = RATE_INVALID;
19417ac9a364SKalle Valo
19427ac9a364SKalle Valo sr = win->success_ratio;
19437ac9a364SKalle Valo
19447ac9a364SKalle Valo /* Collect measured throughputs for current and adjacent rates */
19457ac9a364SKalle Valo current_tpt = win->average_tpt;
19467ac9a364SKalle Valo if (low != RATE_INVALID)
19477ac9a364SKalle Valo low_tpt = tbl->win[low].average_tpt;
19487ac9a364SKalle Valo if (high != RATE_INVALID)
19497ac9a364SKalle Valo high_tpt = tbl->win[high].average_tpt;
19507ac9a364SKalle Valo
19517ac9a364SKalle Valo scale_action = 0;
19527ac9a364SKalle Valo
19537ac9a364SKalle Valo /* Too many failures, decrease rate */
19547ac9a364SKalle Valo if (sr <= RATE_DECREASE_TH || current_tpt == 0) {
19557ac9a364SKalle Valo D_RATE("decrease rate because of low success_ratio\n");
19567ac9a364SKalle Valo scale_action = -1;
19577ac9a364SKalle Valo
19587ac9a364SKalle Valo /* No throughput measured yet for adjacent rates; try increase. */
19597ac9a364SKalle Valo } else if (low_tpt == IL_INVALID_VALUE && high_tpt == IL_INVALID_VALUE) {
19607ac9a364SKalle Valo
19617ac9a364SKalle Valo if (high != RATE_INVALID && sr >= RATE_INCREASE_TH)
19627ac9a364SKalle Valo scale_action = 1;
19637ac9a364SKalle Valo else if (low != RATE_INVALID)
19647ac9a364SKalle Valo scale_action = 0;
19657ac9a364SKalle Valo }
19667ac9a364SKalle Valo
19677ac9a364SKalle Valo /* Both adjacent throughputs are measured, but neither one has better
19687ac9a364SKalle Valo * throughput; we're using the best rate, don't change it! */
19697ac9a364SKalle Valo else if (low_tpt != IL_INVALID_VALUE && high_tpt != IL_INVALID_VALUE &&
19707ac9a364SKalle Valo low_tpt < current_tpt && high_tpt < current_tpt)
19717ac9a364SKalle Valo scale_action = 0;
19727ac9a364SKalle Valo
19737ac9a364SKalle Valo /* At least one adjacent rate's throughput is measured,
19747ac9a364SKalle Valo * and may have better performance. */
19757ac9a364SKalle Valo else {
19767ac9a364SKalle Valo /* Higher adjacent rate's throughput is measured */
19777ac9a364SKalle Valo if (high_tpt != IL_INVALID_VALUE) {
19787ac9a364SKalle Valo /* Higher rate has better throughput */
19797ac9a364SKalle Valo if (high_tpt > current_tpt && sr >= RATE_INCREASE_TH)
19807ac9a364SKalle Valo scale_action = 1;
19817ac9a364SKalle Valo else
19827ac9a364SKalle Valo scale_action = 0;
19837ac9a364SKalle Valo
19847ac9a364SKalle Valo /* Lower adjacent rate's throughput is measured */
19857ac9a364SKalle Valo } else if (low_tpt != IL_INVALID_VALUE) {
19867ac9a364SKalle Valo /* Lower rate has better throughput */
19877ac9a364SKalle Valo if (low_tpt > current_tpt) {
19887ac9a364SKalle Valo D_RATE("decrease rate because of low tpt\n");
19897ac9a364SKalle Valo scale_action = -1;
19907ac9a364SKalle Valo } else if (sr >= RATE_INCREASE_TH) {
19917ac9a364SKalle Valo scale_action = 1;
19927ac9a364SKalle Valo }
19937ac9a364SKalle Valo }
19947ac9a364SKalle Valo }
19957ac9a364SKalle Valo
19967ac9a364SKalle Valo /* Sanity check; asked for decrease, but success rate or throughput
19977ac9a364SKalle Valo * has been good at old rate. Don't change it. */
19987ac9a364SKalle Valo if (scale_action == -1 && low != RATE_INVALID &&
19997ac9a364SKalle Valo (sr > RATE_HIGH_TH || current_tpt > 100 * tbl->expected_tpt[low]))
20007ac9a364SKalle Valo scale_action = 0;
20017ac9a364SKalle Valo
20027ac9a364SKalle Valo switch (scale_action) {
20037ac9a364SKalle Valo case -1:
20047ac9a364SKalle Valo /* Decrease starting rate, update uCode's rate table */
20057ac9a364SKalle Valo if (low != RATE_INVALID) {
20067ac9a364SKalle Valo update_lq = 1;
20077ac9a364SKalle Valo idx = low;
20087ac9a364SKalle Valo }
20097ac9a364SKalle Valo
20107ac9a364SKalle Valo break;
20117ac9a364SKalle Valo case 1:
20127ac9a364SKalle Valo /* Increase starting rate, update uCode's rate table */
20137ac9a364SKalle Valo if (high != RATE_INVALID) {
20147ac9a364SKalle Valo update_lq = 1;
20157ac9a364SKalle Valo idx = high;
20167ac9a364SKalle Valo }
20177ac9a364SKalle Valo
20187ac9a364SKalle Valo break;
20197ac9a364SKalle Valo case 0:
20207ac9a364SKalle Valo /* No change */
20217ac9a364SKalle Valo default:
20227ac9a364SKalle Valo break;
20237ac9a364SKalle Valo }
20247ac9a364SKalle Valo
20257ac9a364SKalle Valo D_RATE("choose rate scale idx %d action %d low %d " "high %d type %d\n",
20267ac9a364SKalle Valo idx, scale_action, low, high, tbl->lq_type);
20277ac9a364SKalle Valo
20287ac9a364SKalle Valo lq_update:
20297ac9a364SKalle Valo /* Replace uCode's rate table for the destination station. */
20307ac9a364SKalle Valo if (update_lq)
20317ac9a364SKalle Valo il4965_rs_update_rate_tbl(il, lq_sta, tbl, idx, is_green);
20327ac9a364SKalle Valo
20337ac9a364SKalle Valo /* Should we stay with this modulation mode,
20347ac9a364SKalle Valo * or search for a new one? */
20357ac9a364SKalle Valo il4965_rs_stay_in_table(lq_sta, false);
20367ac9a364SKalle Valo
20377ac9a364SKalle Valo /*
20387ac9a364SKalle Valo * Search for new modulation mode if we're:
20397ac9a364SKalle Valo * 1) Not changing rates right now
20407ac9a364SKalle Valo * 2) Not just finishing up a search
20417ac9a364SKalle Valo * 3) Allowing a new search
20427ac9a364SKalle Valo */
20437ac9a364SKalle Valo if (!update_lq && !done_search && !lq_sta->stay_in_tbl && win->counter) {
20447ac9a364SKalle Valo /* Save current throughput to compare with "search" throughput */
20457ac9a364SKalle Valo lq_sta->last_tpt = current_tpt;
20467ac9a364SKalle Valo
20477ac9a364SKalle Valo /* Select a new "search" modulation mode to try.
20487ac9a364SKalle Valo * If one is found, set up the new "search" table. */
20497ac9a364SKalle Valo if (is_legacy(tbl->lq_type))
20507ac9a364SKalle Valo il4965_rs_move_legacy_other(il, lq_sta, conf, sta, idx);
20517ac9a364SKalle Valo else if (is_siso(tbl->lq_type))
20527ac9a364SKalle Valo il4965_rs_move_siso_to_other(il, lq_sta, conf, sta,
20537ac9a364SKalle Valo idx);
20547ac9a364SKalle Valo else /* (is_mimo2(tbl->lq_type)) */
20557ac9a364SKalle Valo il4965_rs_move_mimo2_to_other(il, lq_sta, conf, sta,
20567ac9a364SKalle Valo idx);
20577ac9a364SKalle Valo
20587ac9a364SKalle Valo /* If new "search" mode was selected, set up in uCode table */
20597ac9a364SKalle Valo if (lq_sta->search_better_tbl) {
20607ac9a364SKalle Valo /* Access the "search" table, clear its history. */
20617ac9a364SKalle Valo tbl = &(lq_sta->lq_info[(1 - lq_sta->active_tbl)]);
20627ac9a364SKalle Valo for (i = 0; i < RATE_COUNT; i++)
20637ac9a364SKalle Valo il4965_rs_rate_scale_clear_win(&(tbl->win[i]));
20647ac9a364SKalle Valo
20657ac9a364SKalle Valo /* Use new "search" start rate */
20667ac9a364SKalle Valo idx = il4965_hwrate_to_plcp_idx(tbl->current_rate);
20677ac9a364SKalle Valo
20687ac9a364SKalle Valo D_RATE("Switch current mcs: %X idx: %d\n",
20697ac9a364SKalle Valo tbl->current_rate, idx);
20707ac9a364SKalle Valo il4965_rs_fill_link_cmd(il, lq_sta, tbl->current_rate);
20717ac9a364SKalle Valo il_send_lq_cmd(il, &lq_sta->lq, CMD_ASYNC, false);
20727ac9a364SKalle Valo } else
20737ac9a364SKalle Valo done_search = 1;
20747ac9a364SKalle Valo }
20757ac9a364SKalle Valo
20767ac9a364SKalle Valo if (done_search && !lq_sta->stay_in_tbl) {
20777ac9a364SKalle Valo /* If the "active" (non-search) mode was legacy,
20787ac9a364SKalle Valo * and we've tried switching antennas,
20797ac9a364SKalle Valo * but we haven't been able to try HT modes (not available),
20807ac9a364SKalle Valo * stay with best antenna legacy modulation for a while
20817ac9a364SKalle Valo * before next round of mode comparisons. */
20827ac9a364SKalle Valo tbl1 = &(lq_sta->lq_info[lq_sta->active_tbl]);
20837ac9a364SKalle Valo if (is_legacy(tbl1->lq_type) && !conf_is_ht(conf) &&
20847ac9a364SKalle Valo lq_sta->action_counter > tbl1->max_search) {
20857ac9a364SKalle Valo D_RATE("LQ: STAY in legacy table\n");
20867ac9a364SKalle Valo il4965_rs_set_stay_in_table(il, 1, lq_sta);
20877ac9a364SKalle Valo }
20887ac9a364SKalle Valo
20897ac9a364SKalle Valo /* If we're in an HT mode, and all 3 mode switch actions
20907ac9a364SKalle Valo * have been tried and compared, stay in this best modulation
20917ac9a364SKalle Valo * mode for a while before next round of mode comparisons. */
20927ac9a364SKalle Valo if (lq_sta->enable_counter &&
20937ac9a364SKalle Valo lq_sta->action_counter >= tbl1->max_search) {
20947ac9a364SKalle Valo if (lq_sta->last_tpt > IL_AGG_TPT_THREHOLD &&
20957ac9a364SKalle Valo (lq_sta->tx_agg_tid_en & (1 << tid)) &&
20967ac9a364SKalle Valo tid != MAX_TID_COUNT) {
20977ac9a364SKalle Valo tid_data =
20987ac9a364SKalle Valo &il->stations[lq_sta->lq.sta_id].tid[tid];
20997ac9a364SKalle Valo if (tid_data->agg.state == IL_AGG_OFF) {
21007ac9a364SKalle Valo D_RATE("try to aggregate tid %d\n",
21017ac9a364SKalle Valo tid);
21027ac9a364SKalle Valo il4965_rs_tl_turn_on_agg(il, tid,
21037ac9a364SKalle Valo lq_sta, sta);
21047ac9a364SKalle Valo }
21057ac9a364SKalle Valo }
21067ac9a364SKalle Valo il4965_rs_set_stay_in_table(il, 0, lq_sta);
21077ac9a364SKalle Valo }
21087ac9a364SKalle Valo }
21097ac9a364SKalle Valo
21107ac9a364SKalle Valo out:
21117ac9a364SKalle Valo tbl->current_rate =
21127ac9a364SKalle Valo il4965_rate_n_flags_from_tbl(il, tbl, idx, is_green);
21137ac9a364SKalle Valo i = idx;
21147ac9a364SKalle Valo lq_sta->last_txrate_idx = i;
21157ac9a364SKalle Valo }
21167ac9a364SKalle Valo
21173ecf6a3dSLee Jones /*
21187ac9a364SKalle Valo * il4965_rs_initialize_lq - Initialize a station's hardware rate table
21197ac9a364SKalle Valo *
21207ac9a364SKalle Valo * The uCode's station table contains a table of fallback rates
21217ac9a364SKalle Valo * for automatic fallback during transmission.
21227ac9a364SKalle Valo *
21237ac9a364SKalle Valo * NOTE: This sets up a default set of values. These will be replaced later
21247ac9a364SKalle Valo * if the driver's iwl-4965-rs rate scaling algorithm is used, instead of
21257ac9a364SKalle Valo * rc80211_simple.
21267ac9a364SKalle Valo *
21277ac9a364SKalle Valo * NOTE: Run C_ADD_STA command to set up station table entry, before
21287ac9a364SKalle Valo * calling this function (which runs C_TX_LINK_QUALITY_CMD,
21297ac9a364SKalle Valo * which requires station table entry to exist).
21307ac9a364SKalle Valo */
21317ac9a364SKalle Valo static void
il4965_rs_initialize_lq(struct il_priv * il,struct ieee80211_conf * conf,struct ieee80211_sta * sta,struct il_lq_sta * lq_sta)21327ac9a364SKalle Valo il4965_rs_initialize_lq(struct il_priv *il, struct ieee80211_conf *conf,
21337ac9a364SKalle Valo struct ieee80211_sta *sta, struct il_lq_sta *lq_sta)
21347ac9a364SKalle Valo {
21357ac9a364SKalle Valo struct il_scale_tbl_info *tbl;
21367ac9a364SKalle Valo int rate_idx;
21377ac9a364SKalle Valo int i;
21387ac9a364SKalle Valo u32 rate;
21397ac9a364SKalle Valo u8 use_green;
21407ac9a364SKalle Valo u8 active_tbl = 0;
21417ac9a364SKalle Valo u8 valid_tx_ant;
21427ac9a364SKalle Valo
21437ac9a364SKalle Valo if (!sta || !lq_sta)
21447ac9a364SKalle Valo return;
21457ac9a364SKalle Valo
21467ac9a364SKalle Valo use_green = il4965_rs_use_green(il, sta);
21477ac9a364SKalle Valo
21487ac9a364SKalle Valo i = lq_sta->last_txrate_idx;
21497ac9a364SKalle Valo
21507ac9a364SKalle Valo valid_tx_ant = il->hw_params.valid_tx_ant;
21517ac9a364SKalle Valo
21527ac9a364SKalle Valo if (!lq_sta->search_better_tbl)
21537ac9a364SKalle Valo active_tbl = lq_sta->active_tbl;
21547ac9a364SKalle Valo else
21557ac9a364SKalle Valo active_tbl = 1 - lq_sta->active_tbl;
21567ac9a364SKalle Valo
21577ac9a364SKalle Valo tbl = &(lq_sta->lq_info[active_tbl]);
21587ac9a364SKalle Valo
21597ac9a364SKalle Valo if (i < 0 || i >= RATE_COUNT)
21607ac9a364SKalle Valo i = 0;
21617ac9a364SKalle Valo
21627ac9a364SKalle Valo rate = il_rates[i].plcp;
21637ac9a364SKalle Valo tbl->ant_type = il4965_first_antenna(valid_tx_ant);
21647ac9a364SKalle Valo rate |= tbl->ant_type << RATE_MCS_ANT_POS;
21657ac9a364SKalle Valo
21667ac9a364SKalle Valo if (i >= IL_FIRST_CCK_RATE && i <= IL_LAST_CCK_RATE)
21677ac9a364SKalle Valo rate |= RATE_MCS_CCK_MSK;
21687ac9a364SKalle Valo
21697ac9a364SKalle Valo il4965_rs_get_tbl_info_from_mcs(rate, il->band, tbl, &rate_idx);
21707ac9a364SKalle Valo if (!il4965_rs_is_valid_ant(valid_tx_ant, tbl->ant_type))
21717ac9a364SKalle Valo il4965_rs_toggle_antenna(valid_tx_ant, &rate, tbl);
21727ac9a364SKalle Valo
21737ac9a364SKalle Valo rate = il4965_rate_n_flags_from_tbl(il, tbl, rate_idx, use_green);
21747ac9a364SKalle Valo tbl->current_rate = rate;
21757ac9a364SKalle Valo il4965_rs_set_expected_tpt_table(lq_sta, tbl);
21767ac9a364SKalle Valo il4965_rs_fill_link_cmd(NULL, lq_sta, rate);
21777ac9a364SKalle Valo il->stations[lq_sta->lq.sta_id].lq = &lq_sta->lq;
21787ac9a364SKalle Valo il_send_lq_cmd(il, &lq_sta->lq, CMD_SYNC, true);
21797ac9a364SKalle Valo }
21807ac9a364SKalle Valo
21817ac9a364SKalle Valo static void
il4965_rs_get_rate(void * il_r,struct ieee80211_sta * sta,void * il_sta,struct ieee80211_tx_rate_control * txrc)21827ac9a364SKalle Valo il4965_rs_get_rate(void *il_r, struct ieee80211_sta *sta, void *il_sta,
21837ac9a364SKalle Valo struct ieee80211_tx_rate_control *txrc)
21847ac9a364SKalle Valo {
21857ac9a364SKalle Valo
21867ac9a364SKalle Valo struct sk_buff *skb = txrc->skb;
21877ac9a364SKalle Valo struct ieee80211_supported_band *sband = txrc->sband;
21887ac9a364SKalle Valo struct il_priv *il __maybe_unused = (struct il_priv *)il_r;
21897ac9a364SKalle Valo struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
21907ac9a364SKalle Valo struct il_lq_sta *lq_sta = il_sta;
21917ac9a364SKalle Valo int rate_idx;
21927ac9a364SKalle Valo
21937ac9a364SKalle Valo D_RATE("rate scale calculate new rate for skb\n");
21947ac9a364SKalle Valo
21957ac9a364SKalle Valo /* Get max rate if user set max rate */
21967ac9a364SKalle Valo if (lq_sta) {
2197a3f9d596SJohannes Berg lq_sta->max_rate_idx = fls(txrc->rate_idx_mask) - 1;
219857fbcce3SJohannes Berg if (sband->band == NL80211_BAND_5GHZ &&
21997ac9a364SKalle Valo lq_sta->max_rate_idx != -1)
22007ac9a364SKalle Valo lq_sta->max_rate_idx += IL_FIRST_OFDM_RATE;
22017ac9a364SKalle Valo if (lq_sta->max_rate_idx < 0 ||
22027ac9a364SKalle Valo lq_sta->max_rate_idx >= RATE_COUNT)
22037ac9a364SKalle Valo lq_sta->max_rate_idx = -1;
22047ac9a364SKalle Valo }
22057ac9a364SKalle Valo
22067ac9a364SKalle Valo /* Treat uninitialized rate scaling data same as non-existing. */
22077ac9a364SKalle Valo if (lq_sta && !lq_sta->drv) {
22087ac9a364SKalle Valo D_RATE("Rate scaling not initialized yet.\n");
22097ac9a364SKalle Valo il_sta = NULL;
22107ac9a364SKalle Valo }
22117ac9a364SKalle Valo
22127ac9a364SKalle Valo if (!lq_sta)
22137ac9a364SKalle Valo return;
22147ac9a364SKalle Valo
22157ac9a364SKalle Valo rate_idx = lq_sta->last_txrate_idx;
22167ac9a364SKalle Valo
22177ac9a364SKalle Valo if (lq_sta->last_rate_n_flags & RATE_MCS_HT_MSK) {
22187ac9a364SKalle Valo rate_idx -= IL_FIRST_OFDM_RATE;
22197ac9a364SKalle Valo /* 6M and 9M shared same MCS idx */
22207ac9a364SKalle Valo rate_idx = (rate_idx > 0) ? (rate_idx - 1) : 0;
22217ac9a364SKalle Valo if (il4965_rs_extract_rate(lq_sta->last_rate_n_flags) >=
22227ac9a364SKalle Valo RATE_MIMO2_6M_PLCP)
22237ac9a364SKalle Valo rate_idx = rate_idx + MCS_IDX_PER_STREAM;
22247ac9a364SKalle Valo info->control.rates[0].flags = IEEE80211_TX_RC_MCS;
22257ac9a364SKalle Valo if (lq_sta->last_rate_n_flags & RATE_MCS_SGI_MSK)
22267ac9a364SKalle Valo info->control.rates[0].flags |=
22277ac9a364SKalle Valo IEEE80211_TX_RC_SHORT_GI;
22287ac9a364SKalle Valo if (lq_sta->last_rate_n_flags & RATE_MCS_DUP_MSK)
22297ac9a364SKalle Valo info->control.rates[0].flags |=
22307ac9a364SKalle Valo IEEE80211_TX_RC_DUP_DATA;
22317ac9a364SKalle Valo if (lq_sta->last_rate_n_flags & RATE_MCS_HT40_MSK)
22327ac9a364SKalle Valo info->control.rates[0].flags |=
22337ac9a364SKalle Valo IEEE80211_TX_RC_40_MHZ_WIDTH;
22347ac9a364SKalle Valo if (lq_sta->last_rate_n_flags & RATE_MCS_GF_MSK)
22357ac9a364SKalle Valo info->control.rates[0].flags |=
22367ac9a364SKalle Valo IEEE80211_TX_RC_GREEN_FIELD;
22377ac9a364SKalle Valo } else {
22387ac9a364SKalle Valo /* Check for invalid rates */
22397ac9a364SKalle Valo if (rate_idx < 0 || rate_idx >= RATE_COUNT_LEGACY ||
224057fbcce3SJohannes Berg (sband->band == NL80211_BAND_5GHZ &&
22417ac9a364SKalle Valo rate_idx < IL_FIRST_OFDM_RATE))
22427ac9a364SKalle Valo rate_idx = rate_lowest_index(sband, sta);
22437ac9a364SKalle Valo /* On valid 5 GHz rate, adjust idx */
224457fbcce3SJohannes Berg else if (sband->band == NL80211_BAND_5GHZ)
22457ac9a364SKalle Valo rate_idx -= IL_FIRST_OFDM_RATE;
22467ac9a364SKalle Valo info->control.rates[0].flags = 0;
22477ac9a364SKalle Valo }
22487ac9a364SKalle Valo info->control.rates[0].idx = rate_idx;
22497ac9a364SKalle Valo info->control.rates[0].count = 1;
22507ac9a364SKalle Valo }
22517ac9a364SKalle Valo
22527ac9a364SKalle Valo static void *
il4965_rs_alloc_sta(void * il_rate,struct ieee80211_sta * sta,gfp_t gfp)22537ac9a364SKalle Valo il4965_rs_alloc_sta(void *il_rate, struct ieee80211_sta *sta, gfp_t gfp)
22547ac9a364SKalle Valo {
22557ac9a364SKalle Valo struct il_station_priv *sta_priv =
22567ac9a364SKalle Valo (struct il_station_priv *)sta->drv_priv;
22577ac9a364SKalle Valo struct il_priv *il;
22587ac9a364SKalle Valo
22597ac9a364SKalle Valo il = (struct il_priv *)il_rate;
22607ac9a364SKalle Valo D_RATE("create station rate scale win\n");
22617ac9a364SKalle Valo
22627ac9a364SKalle Valo return &sta_priv->lq_sta;
22637ac9a364SKalle Valo }
22647ac9a364SKalle Valo
22657ac9a364SKalle Valo /*
22667ac9a364SKalle Valo * Called after adding a new station to initialize rate scaling
22677ac9a364SKalle Valo */
22687ac9a364SKalle Valo void
il4965_rs_rate_init(struct il_priv * il,struct ieee80211_sta * sta,u8 sta_id)22697ac9a364SKalle Valo il4965_rs_rate_init(struct il_priv *il, struct ieee80211_sta *sta, u8 sta_id)
22707ac9a364SKalle Valo {
22717ac9a364SKalle Valo int i, j;
22727ac9a364SKalle Valo struct ieee80211_hw *hw = il->hw;
22737ac9a364SKalle Valo struct ieee80211_conf *conf = &il->hw->conf;
2274046d2e7cSSriram R struct ieee80211_sta_ht_cap *ht_cap = &sta->deflink.ht_cap;
22757ac9a364SKalle Valo struct il_station_priv *sta_priv;
22767ac9a364SKalle Valo struct il_lq_sta *lq_sta;
22777ac9a364SKalle Valo struct ieee80211_supported_band *sband;
22787ac9a364SKalle Valo
22797ac9a364SKalle Valo sta_priv = (struct il_station_priv *)sta->drv_priv;
22807ac9a364SKalle Valo lq_sta = &sta_priv->lq_sta;
22817ac9a364SKalle Valo sband = hw->wiphy->bands[conf->chandef.chan->band];
22827ac9a364SKalle Valo
22837ac9a364SKalle Valo lq_sta->lq.sta_id = sta_id;
22847ac9a364SKalle Valo
22857ac9a364SKalle Valo for (j = 0; j < LQ_SIZE; j++)
22867ac9a364SKalle Valo for (i = 0; i < RATE_COUNT; i++)
22877ac9a364SKalle Valo il4965_rs_rate_scale_clear_win(&lq_sta->lq_info[j].
22887ac9a364SKalle Valo win[i]);
22897ac9a364SKalle Valo
22907ac9a364SKalle Valo lq_sta->flush_timer = 0;
2291046d2e7cSSriram R lq_sta->supp_rates = sta->deflink.supp_rates[sband->band];
22927ac9a364SKalle Valo for (j = 0; j < LQ_SIZE; j++)
22937ac9a364SKalle Valo for (i = 0; i < RATE_COUNT; i++)
22947ac9a364SKalle Valo il4965_rs_rate_scale_clear_win(&lq_sta->lq_info[j].
22957ac9a364SKalle Valo win[i]);
22967ac9a364SKalle Valo
22977ac9a364SKalle Valo D_RATE("LQ:" "*** rate scale station global init for station %d ***\n",
22987ac9a364SKalle Valo sta_id);
22997ac9a364SKalle Valo /* TODO: what is a good starting rate for STA? About middle? Maybe not
23007ac9a364SKalle Valo * the lowest or the highest rate.. Could consider using RSSI from
23017ac9a364SKalle Valo * previous packets? Need to have IEEE 802.1X auth succeed immediately
23027ac9a364SKalle Valo * after assoc.. */
23037ac9a364SKalle Valo
23047ac9a364SKalle Valo lq_sta->is_dup = 0;
23057ac9a364SKalle Valo lq_sta->max_rate_idx = -1;
23067ac9a364SKalle Valo lq_sta->missed_rate_counter = IL_MISSED_RATE_MAX;
23077ac9a364SKalle Valo lq_sta->is_green = il4965_rs_use_green(il, sta);
23087ac9a364SKalle Valo lq_sta->active_legacy_rate = il->active_rate & ~(0x1000);
23097ac9a364SKalle Valo lq_sta->band = il->band;
23107ac9a364SKalle Valo /*
23117ac9a364SKalle Valo * active_siso_rate mask includes 9 MBits (bit 5), and CCK (bits 0-3),
23127ac9a364SKalle Valo * supp_rates[] does not; shift to convert format, force 9 MBits off.
23137ac9a364SKalle Valo */
23147ac9a364SKalle Valo lq_sta->active_siso_rate = ht_cap->mcs.rx_mask[0] << 1;
23157ac9a364SKalle Valo lq_sta->active_siso_rate |= ht_cap->mcs.rx_mask[0] & 0x1;
23167ac9a364SKalle Valo lq_sta->active_siso_rate &= ~((u16) 0x2);
23177ac9a364SKalle Valo lq_sta->active_siso_rate <<= IL_FIRST_OFDM_RATE;
23187ac9a364SKalle Valo
23197ac9a364SKalle Valo /* Same here */
23207ac9a364SKalle Valo lq_sta->active_mimo2_rate = ht_cap->mcs.rx_mask[1] << 1;
23217ac9a364SKalle Valo lq_sta->active_mimo2_rate |= ht_cap->mcs.rx_mask[1] & 0x1;
23227ac9a364SKalle Valo lq_sta->active_mimo2_rate &= ~((u16) 0x2);
23237ac9a364SKalle Valo lq_sta->active_mimo2_rate <<= IL_FIRST_OFDM_RATE;
23247ac9a364SKalle Valo
23257ac9a364SKalle Valo /* These values will be overridden later */
23267ac9a364SKalle Valo lq_sta->lq.general_params.single_stream_ant_msk =
23277ac9a364SKalle Valo il4965_first_antenna(il->hw_params.valid_tx_ant);
23287ac9a364SKalle Valo lq_sta->lq.general_params.dual_stream_ant_msk =
23297ac9a364SKalle Valo il->hw_params.valid_tx_ant & ~il4965_first_antenna(il->hw_params.
23307ac9a364SKalle Valo valid_tx_ant);
23317ac9a364SKalle Valo if (!lq_sta->lq.general_params.dual_stream_ant_msk) {
23327ac9a364SKalle Valo lq_sta->lq.general_params.dual_stream_ant_msk = ANT_AB;
23337ac9a364SKalle Valo } else if (il4965_num_of_ant(il->hw_params.valid_tx_ant) == 2) {
23347ac9a364SKalle Valo lq_sta->lq.general_params.dual_stream_ant_msk =
23357ac9a364SKalle Valo il->hw_params.valid_tx_ant;
23367ac9a364SKalle Valo }
23377ac9a364SKalle Valo
23387ac9a364SKalle Valo /* as default allow aggregation for all tids */
23397ac9a364SKalle Valo lq_sta->tx_agg_tid_en = IL_AGG_ALL_TID;
23407ac9a364SKalle Valo lq_sta->drv = il;
23417ac9a364SKalle Valo
23427ac9a364SKalle Valo /* Set last_txrate_idx to lowest rate */
23437ac9a364SKalle Valo lq_sta->last_txrate_idx = rate_lowest_index(sband, sta);
234457fbcce3SJohannes Berg if (sband->band == NL80211_BAND_5GHZ)
23457ac9a364SKalle Valo lq_sta->last_txrate_idx += IL_FIRST_OFDM_RATE;
23467ac9a364SKalle Valo lq_sta->is_agg = 0;
23477ac9a364SKalle Valo
23487ac9a364SKalle Valo #ifdef CONFIG_MAC80211_DEBUGFS
23497ac9a364SKalle Valo lq_sta->dbg_fixed_rate = 0;
23507ac9a364SKalle Valo #endif
23517ac9a364SKalle Valo
23527ac9a364SKalle Valo il4965_rs_initialize_lq(il, conf, sta, lq_sta);
23537ac9a364SKalle Valo }
23547ac9a364SKalle Valo
23557ac9a364SKalle Valo static void
il4965_rs_fill_link_cmd(struct il_priv * il,struct il_lq_sta * lq_sta,u32 new_rate)23567ac9a364SKalle Valo il4965_rs_fill_link_cmd(struct il_priv *il, struct il_lq_sta *lq_sta,
23577ac9a364SKalle Valo u32 new_rate)
23587ac9a364SKalle Valo {
23597ac9a364SKalle Valo struct il_scale_tbl_info tbl_type;
23607ac9a364SKalle Valo int idx = 0;
23617ac9a364SKalle Valo int rate_idx;
23627ac9a364SKalle Valo int repeat_rate = 0;
23637ac9a364SKalle Valo u8 ant_toggle_cnt = 0;
23647ac9a364SKalle Valo u8 use_ht_possible = 1;
23657ac9a364SKalle Valo u8 valid_tx_ant = 0;
23667ac9a364SKalle Valo struct il_link_quality_cmd *lq_cmd = &lq_sta->lq;
23677ac9a364SKalle Valo
23687ac9a364SKalle Valo /* Override starting rate (idx 0) if needed for debug purposes */
23697ac9a364SKalle Valo il4965_rs_dbgfs_set_mcs(lq_sta, &new_rate, idx);
23707ac9a364SKalle Valo
23717ac9a364SKalle Valo /* Interpret new_rate (rate_n_flags) */
23727ac9a364SKalle Valo il4965_rs_get_tbl_info_from_mcs(new_rate, lq_sta->band, &tbl_type,
23737ac9a364SKalle Valo &rate_idx);
23747ac9a364SKalle Valo
23757ac9a364SKalle Valo /* How many times should we repeat the initial rate? */
23767ac9a364SKalle Valo if (is_legacy(tbl_type.lq_type)) {
23777ac9a364SKalle Valo ant_toggle_cnt = 1;
23787ac9a364SKalle Valo repeat_rate = IL_NUMBER_TRY;
23797ac9a364SKalle Valo } else {
23807ac9a364SKalle Valo repeat_rate = IL_HT_NUMBER_TRY;
23817ac9a364SKalle Valo }
23827ac9a364SKalle Valo
23837ac9a364SKalle Valo lq_cmd->general_params.mimo_delimiter =
23847ac9a364SKalle Valo is_mimo(tbl_type.lq_type) ? 1 : 0;
23857ac9a364SKalle Valo
23867ac9a364SKalle Valo /* Fill 1st table entry (idx 0) */
23877ac9a364SKalle Valo lq_cmd->rs_table[idx].rate_n_flags = cpu_to_le32(new_rate);
23887ac9a364SKalle Valo
23897ac9a364SKalle Valo if (il4965_num_of_ant(tbl_type.ant_type) == 1) {
23907ac9a364SKalle Valo lq_cmd->general_params.single_stream_ant_msk =
23917ac9a364SKalle Valo tbl_type.ant_type;
23927ac9a364SKalle Valo } else if (il4965_num_of_ant(tbl_type.ant_type) == 2) {
23937ac9a364SKalle Valo lq_cmd->general_params.dual_stream_ant_msk = tbl_type.ant_type;
23947ac9a364SKalle Valo }
23957ac9a364SKalle Valo /* otherwise we don't modify the existing value */
23967ac9a364SKalle Valo idx++;
23977ac9a364SKalle Valo repeat_rate--;
23987ac9a364SKalle Valo if (il)
23997ac9a364SKalle Valo valid_tx_ant = il->hw_params.valid_tx_ant;
24007ac9a364SKalle Valo
24017ac9a364SKalle Valo /* Fill rest of rate table */
24027ac9a364SKalle Valo while (idx < LINK_QUAL_MAX_RETRY_NUM) {
24037ac9a364SKalle Valo /* Repeat initial/next rate.
24047ac9a364SKalle Valo * For legacy IL_NUMBER_TRY == 1, this loop will not execute.
24057ac9a364SKalle Valo * For HT IL_HT_NUMBER_TRY == 3, this executes twice. */
24066d0ef724SStanislaw Gruszka while (repeat_rate > 0 && idx < (LINK_QUAL_MAX_RETRY_NUM - 1)) {
24077ac9a364SKalle Valo if (is_legacy(tbl_type.lq_type)) {
24087ac9a364SKalle Valo if (ant_toggle_cnt < NUM_TRY_BEFORE_ANT_TOGGLE)
24097ac9a364SKalle Valo ant_toggle_cnt++;
24107ac9a364SKalle Valo else if (il &&
24117ac9a364SKalle Valo il4965_rs_toggle_antenna(valid_tx_ant,
24127ac9a364SKalle Valo &new_rate,
24137ac9a364SKalle Valo &tbl_type))
24147ac9a364SKalle Valo ant_toggle_cnt = 1;
24157ac9a364SKalle Valo }
24167ac9a364SKalle Valo
24177ac9a364SKalle Valo /* Override next rate if needed for debug purposes */
24187ac9a364SKalle Valo il4965_rs_dbgfs_set_mcs(lq_sta, &new_rate, idx);
24197ac9a364SKalle Valo
24207ac9a364SKalle Valo /* Fill next table entry */
24217ac9a364SKalle Valo lq_cmd->rs_table[idx].rate_n_flags =
24227ac9a364SKalle Valo cpu_to_le32(new_rate);
24237ac9a364SKalle Valo repeat_rate--;
24247ac9a364SKalle Valo idx++;
24257ac9a364SKalle Valo }
24267ac9a364SKalle Valo
24277ac9a364SKalle Valo il4965_rs_get_tbl_info_from_mcs(new_rate, lq_sta->band,
24287ac9a364SKalle Valo &tbl_type, &rate_idx);
24297ac9a364SKalle Valo
24307ac9a364SKalle Valo /* Indicate to uCode which entries might be MIMO.
24317ac9a364SKalle Valo * If initial rate was MIMO, this will finally end up
24327ac9a364SKalle Valo * as (IL_HT_NUMBER_TRY * 2), after 2nd pass, otherwise 0. */
24337ac9a364SKalle Valo if (is_mimo(tbl_type.lq_type))
24347ac9a364SKalle Valo lq_cmd->general_params.mimo_delimiter = idx;
24357ac9a364SKalle Valo
24367ac9a364SKalle Valo /* Get next rate */
24377ac9a364SKalle Valo new_rate =
24387ac9a364SKalle Valo il4965_rs_get_lower_rate(lq_sta, &tbl_type, rate_idx,
24397ac9a364SKalle Valo use_ht_possible);
24407ac9a364SKalle Valo
24417ac9a364SKalle Valo /* How many times should we repeat the next rate? */
24427ac9a364SKalle Valo if (is_legacy(tbl_type.lq_type)) {
24437ac9a364SKalle Valo if (ant_toggle_cnt < NUM_TRY_BEFORE_ANT_TOGGLE)
24447ac9a364SKalle Valo ant_toggle_cnt++;
24457ac9a364SKalle Valo else if (il &&
24467ac9a364SKalle Valo il4965_rs_toggle_antenna(valid_tx_ant,
24477ac9a364SKalle Valo &new_rate, &tbl_type))
24487ac9a364SKalle Valo ant_toggle_cnt = 1;
24497ac9a364SKalle Valo
24507ac9a364SKalle Valo repeat_rate = IL_NUMBER_TRY;
24517ac9a364SKalle Valo } else {
24527ac9a364SKalle Valo repeat_rate = IL_HT_NUMBER_TRY;
24537ac9a364SKalle Valo }
24547ac9a364SKalle Valo
24557ac9a364SKalle Valo /* Don't allow HT rates after next pass.
24567ac9a364SKalle Valo * il4965_rs_get_lower_rate() will change type to LQ_A or LQ_G. */
24577ac9a364SKalle Valo use_ht_possible = 0;
24587ac9a364SKalle Valo
24597ac9a364SKalle Valo /* Override next rate if needed for debug purposes */
24607ac9a364SKalle Valo il4965_rs_dbgfs_set_mcs(lq_sta, &new_rate, idx);
24617ac9a364SKalle Valo
24627ac9a364SKalle Valo /* Fill next table entry */
24637ac9a364SKalle Valo lq_cmd->rs_table[idx].rate_n_flags = cpu_to_le32(new_rate);
24647ac9a364SKalle Valo
24657ac9a364SKalle Valo idx++;
24667ac9a364SKalle Valo repeat_rate--;
24677ac9a364SKalle Valo }
24687ac9a364SKalle Valo
24697ac9a364SKalle Valo lq_cmd->agg_params.agg_frame_cnt_limit = LINK_QUAL_AGG_FRAME_LIMIT_DEF;
24707ac9a364SKalle Valo lq_cmd->agg_params.agg_dis_start_th = LINK_QUAL_AGG_DISABLE_START_DEF;
24717ac9a364SKalle Valo
24727ac9a364SKalle Valo lq_cmd->agg_params.agg_time_limit =
24737ac9a364SKalle Valo cpu_to_le16(LINK_QUAL_AGG_TIME_LIMIT_DEF);
24747ac9a364SKalle Valo }
24757ac9a364SKalle Valo
24767ac9a364SKalle Valo static void *
il4965_rs_alloc(struct ieee80211_hw * hw)24776cb5f3eaSJohannes Berg il4965_rs_alloc(struct ieee80211_hw *hw)
24787ac9a364SKalle Valo {
24797ac9a364SKalle Valo return hw->priv;
24807ac9a364SKalle Valo }
24817ac9a364SKalle Valo
24827ac9a364SKalle Valo /* rate scale requires free function to be implemented */
24837ac9a364SKalle Valo static void
il4965_rs_free(void * il_rate)24847ac9a364SKalle Valo il4965_rs_free(void *il_rate)
24857ac9a364SKalle Valo {
24867ac9a364SKalle Valo return;
24877ac9a364SKalle Valo }
24887ac9a364SKalle Valo
24897ac9a364SKalle Valo static void
il4965_rs_free_sta(void * il_r,struct ieee80211_sta * sta,void * il_sta)24907ac9a364SKalle Valo il4965_rs_free_sta(void *il_r, struct ieee80211_sta *sta, void *il_sta)
24917ac9a364SKalle Valo {
24927ac9a364SKalle Valo struct il_priv *il __maybe_unused = il_r;
24937ac9a364SKalle Valo
24947ac9a364SKalle Valo D_RATE("enter\n");
24957ac9a364SKalle Valo D_RATE("leave\n");
24967ac9a364SKalle Valo }
24977ac9a364SKalle Valo
24987ac9a364SKalle Valo #ifdef CONFIG_MAC80211_DEBUGFS
24997ac9a364SKalle Valo
25007ac9a364SKalle Valo static void
il4965_rs_dbgfs_set_mcs(struct il_lq_sta * lq_sta,u32 * rate_n_flags,int idx)25017ac9a364SKalle Valo il4965_rs_dbgfs_set_mcs(struct il_lq_sta *lq_sta, u32 * rate_n_flags, int idx)
25027ac9a364SKalle Valo {
25037ac9a364SKalle Valo struct il_priv *il;
25047ac9a364SKalle Valo u8 valid_tx_ant;
25057ac9a364SKalle Valo u8 ant_sel_tx;
25067ac9a364SKalle Valo
25077ac9a364SKalle Valo il = lq_sta->drv;
25087ac9a364SKalle Valo valid_tx_ant = il->hw_params.valid_tx_ant;
25097ac9a364SKalle Valo if (lq_sta->dbg_fixed_rate) {
25107ac9a364SKalle Valo ant_sel_tx =
25117ac9a364SKalle Valo ((lq_sta->
25127ac9a364SKalle Valo dbg_fixed_rate & RATE_MCS_ANT_ABC_MSK) >>
25137ac9a364SKalle Valo RATE_MCS_ANT_POS);
25147ac9a364SKalle Valo if ((valid_tx_ant & ant_sel_tx) == ant_sel_tx) {
25157ac9a364SKalle Valo *rate_n_flags = lq_sta->dbg_fixed_rate;
25167ac9a364SKalle Valo D_RATE("Fixed rate ON\n");
25177ac9a364SKalle Valo } else {
25187ac9a364SKalle Valo lq_sta->dbg_fixed_rate = 0;
25197ac9a364SKalle Valo IL_ERR
25207ac9a364SKalle Valo ("Invalid antenna selection 0x%X, Valid is 0x%X\n",
25217ac9a364SKalle Valo ant_sel_tx, valid_tx_ant);
25227ac9a364SKalle Valo D_RATE("Fixed rate OFF\n");
25237ac9a364SKalle Valo }
25247ac9a364SKalle Valo } else {
25257ac9a364SKalle Valo D_RATE("Fixed rate OFF\n");
25267ac9a364SKalle Valo }
25277ac9a364SKalle Valo }
25287ac9a364SKalle Valo
25297ac9a364SKalle Valo static ssize_t
il4965_rs_sta_dbgfs_scale_table_write(struct file * file,const char __user * user_buf,size_t count,loff_t * ppos)25307ac9a364SKalle Valo il4965_rs_sta_dbgfs_scale_table_write(struct file *file,
25317ac9a364SKalle Valo const char __user *user_buf,
25327ac9a364SKalle Valo size_t count, loff_t *ppos)
25337ac9a364SKalle Valo {
25347ac9a364SKalle Valo struct il_lq_sta *lq_sta = file->private_data;
25357ac9a364SKalle Valo struct il_priv *il;
25367ac9a364SKalle Valo char buf[64];
25377ac9a364SKalle Valo size_t buf_size;
25387ac9a364SKalle Valo u32 parsed_rate;
25397ac9a364SKalle Valo
25407ac9a364SKalle Valo il = lq_sta->drv;
25417ac9a364SKalle Valo memset(buf, 0, sizeof(buf));
25427ac9a364SKalle Valo buf_size = min(count, sizeof(buf) - 1);
25437ac9a364SKalle Valo if (copy_from_user(buf, user_buf, buf_size))
25447ac9a364SKalle Valo return -EFAULT;
25457ac9a364SKalle Valo
25467ac9a364SKalle Valo if (sscanf(buf, "%x", &parsed_rate) == 1)
25477ac9a364SKalle Valo lq_sta->dbg_fixed_rate = parsed_rate;
25487ac9a364SKalle Valo else
25497ac9a364SKalle Valo lq_sta->dbg_fixed_rate = 0;
25507ac9a364SKalle Valo
25517ac9a364SKalle Valo lq_sta->active_legacy_rate = 0x0FFF; /* 1 - 54 MBits, includes CCK */
25527ac9a364SKalle Valo lq_sta->active_siso_rate = 0x1FD0; /* 6 - 60 MBits, no 9, no CCK */
25537ac9a364SKalle Valo lq_sta->active_mimo2_rate = 0x1FD0; /* 6 - 60 MBits, no 9, no CCK */
25547ac9a364SKalle Valo
25557ac9a364SKalle Valo D_RATE("sta_id %d rate 0x%X\n", lq_sta->lq.sta_id,
25567ac9a364SKalle Valo lq_sta->dbg_fixed_rate);
25577ac9a364SKalle Valo
25587ac9a364SKalle Valo if (lq_sta->dbg_fixed_rate) {
25597ac9a364SKalle Valo il4965_rs_fill_link_cmd(NULL, lq_sta, lq_sta->dbg_fixed_rate);
25607ac9a364SKalle Valo il_send_lq_cmd(lq_sta->drv, &lq_sta->lq, CMD_ASYNC, false);
25617ac9a364SKalle Valo }
25627ac9a364SKalle Valo
25637ac9a364SKalle Valo return count;
25647ac9a364SKalle Valo }
25657ac9a364SKalle Valo
25667ac9a364SKalle Valo static ssize_t
il4965_rs_sta_dbgfs_scale_table_read(struct file * file,char __user * user_buf,size_t count,loff_t * ppos)25677ac9a364SKalle Valo il4965_rs_sta_dbgfs_scale_table_read(struct file *file, char __user *user_buf,
25687ac9a364SKalle Valo size_t count, loff_t *ppos)
25697ac9a364SKalle Valo {
25707ac9a364SKalle Valo char *buff;
25717ac9a364SKalle Valo int desc = 0;
25727ac9a364SKalle Valo int i = 0;
25737ac9a364SKalle Valo int idx = 0;
25747ac9a364SKalle Valo ssize_t ret;
25757ac9a364SKalle Valo
25767ac9a364SKalle Valo struct il_lq_sta *lq_sta = file->private_data;
25777ac9a364SKalle Valo struct il_priv *il;
25787ac9a364SKalle Valo struct il_scale_tbl_info *tbl = &(lq_sta->lq_info[lq_sta->active_tbl]);
25797ac9a364SKalle Valo
25807ac9a364SKalle Valo il = lq_sta->drv;
25817ac9a364SKalle Valo buff = kmalloc(1024, GFP_KERNEL);
25827ac9a364SKalle Valo if (!buff)
25837ac9a364SKalle Valo return -ENOMEM;
25847ac9a364SKalle Valo
25857ac9a364SKalle Valo desc += sprintf(buff + desc, "sta_id %d\n", lq_sta->lq.sta_id);
25867ac9a364SKalle Valo desc +=
25877ac9a364SKalle Valo sprintf(buff + desc, "failed=%d success=%d rate=0%X\n",
25887ac9a364SKalle Valo lq_sta->total_failed, lq_sta->total_success,
25897ac9a364SKalle Valo lq_sta->active_legacy_rate);
25907ac9a364SKalle Valo desc +=
25917ac9a364SKalle Valo sprintf(buff + desc, "fixed rate 0x%X\n", lq_sta->dbg_fixed_rate);
25927ac9a364SKalle Valo desc +=
25937ac9a364SKalle Valo sprintf(buff + desc, "valid_tx_ant %s%s%s\n",
25947ac9a364SKalle Valo (il->hw_params.valid_tx_ant & ANT_A) ? "ANT_A," : "",
25957ac9a364SKalle Valo (il->hw_params.valid_tx_ant & ANT_B) ? "ANT_B," : "",
25967ac9a364SKalle Valo (il->hw_params.valid_tx_ant & ANT_C) ? "ANT_C" : "");
25977ac9a364SKalle Valo desc +=
25987ac9a364SKalle Valo sprintf(buff + desc, "lq type %s\n",
25997ac9a364SKalle Valo (is_legacy(tbl->lq_type)) ? "legacy" : "HT");
26007ac9a364SKalle Valo if (is_Ht(tbl->lq_type)) {
26017ac9a364SKalle Valo desc +=
26027ac9a364SKalle Valo sprintf(buff + desc, " %s",
26037ac9a364SKalle Valo (is_siso(tbl->lq_type)) ? "SISO" : "MIMO2");
26047ac9a364SKalle Valo desc +=
26057ac9a364SKalle Valo sprintf(buff + desc, " %s",
26067ac9a364SKalle Valo (tbl->is_ht40) ? "40MHz" : "20MHz");
26077ac9a364SKalle Valo desc +=
26087ac9a364SKalle Valo sprintf(buff + desc, " %s %s %s\n",
26097ac9a364SKalle Valo (tbl->is_SGI) ? "SGI" : "",
26107ac9a364SKalle Valo (lq_sta->is_green) ? "GF enabled" : "",
26117ac9a364SKalle Valo (lq_sta->is_agg) ? "AGG on" : "");
26127ac9a364SKalle Valo }
26137ac9a364SKalle Valo desc +=
26147ac9a364SKalle Valo sprintf(buff + desc, "last tx rate=0x%X\n",
26157ac9a364SKalle Valo lq_sta->last_rate_n_flags);
26167ac9a364SKalle Valo desc +=
26177ac9a364SKalle Valo sprintf(buff + desc,
26187ac9a364SKalle Valo "general:" "flags=0x%X mimo-d=%d s-ant0x%x d-ant=0x%x\n",
26197ac9a364SKalle Valo lq_sta->lq.general_params.flags,
26207ac9a364SKalle Valo lq_sta->lq.general_params.mimo_delimiter,
26217ac9a364SKalle Valo lq_sta->lq.general_params.single_stream_ant_msk,
26227ac9a364SKalle Valo lq_sta->lq.general_params.dual_stream_ant_msk);
26237ac9a364SKalle Valo
26247ac9a364SKalle Valo desc +=
26257ac9a364SKalle Valo sprintf(buff + desc,
26267ac9a364SKalle Valo "agg:"
26277ac9a364SKalle Valo "time_limit=%d dist_start_th=%d frame_cnt_limit=%d\n",
26287ac9a364SKalle Valo le16_to_cpu(lq_sta->lq.agg_params.agg_time_limit),
26297ac9a364SKalle Valo lq_sta->lq.agg_params.agg_dis_start_th,
26307ac9a364SKalle Valo lq_sta->lq.agg_params.agg_frame_cnt_limit);
26317ac9a364SKalle Valo
26327ac9a364SKalle Valo desc +=
26337ac9a364SKalle Valo sprintf(buff + desc,
26347ac9a364SKalle Valo "Start idx [0]=0x%x [1]=0x%x [2]=0x%x [3]=0x%x\n",
26357ac9a364SKalle Valo lq_sta->lq.general_params.start_rate_idx[0],
26367ac9a364SKalle Valo lq_sta->lq.general_params.start_rate_idx[1],
26377ac9a364SKalle Valo lq_sta->lq.general_params.start_rate_idx[2],
26387ac9a364SKalle Valo lq_sta->lq.general_params.start_rate_idx[3]);
26397ac9a364SKalle Valo
26407ac9a364SKalle Valo for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) {
26417ac9a364SKalle Valo idx =
26427ac9a364SKalle Valo il4965_hwrate_to_plcp_idx(le32_to_cpu
26437ac9a364SKalle Valo (lq_sta->lq.rs_table[i].
26447ac9a364SKalle Valo rate_n_flags));
26457ac9a364SKalle Valo if (is_legacy(tbl->lq_type)) {
26467ac9a364SKalle Valo desc +=
26477ac9a364SKalle Valo sprintf(buff + desc, " rate[%d] 0x%X %smbps\n", i,
26487ac9a364SKalle Valo le32_to_cpu(lq_sta->lq.rs_table[i].
26497ac9a364SKalle Valo rate_n_flags),
26507ac9a364SKalle Valo il_rate_mcs[idx].mbps);
26517ac9a364SKalle Valo } else {
26527ac9a364SKalle Valo desc +=
26537ac9a364SKalle Valo sprintf(buff + desc, " rate[%d] 0x%X %smbps (%s)\n",
26547ac9a364SKalle Valo i,
26557ac9a364SKalle Valo le32_to_cpu(lq_sta->lq.rs_table[i].
26567ac9a364SKalle Valo rate_n_flags),
26577ac9a364SKalle Valo il_rate_mcs[idx].mbps,
26587ac9a364SKalle Valo il_rate_mcs[idx].mcs);
26597ac9a364SKalle Valo }
26607ac9a364SKalle Valo }
26617ac9a364SKalle Valo
26627ac9a364SKalle Valo ret = simple_read_from_buffer(user_buf, count, ppos, buff, desc);
26637ac9a364SKalle Valo kfree(buff);
26647ac9a364SKalle Valo return ret;
26657ac9a364SKalle Valo }
26667ac9a364SKalle Valo
26677ac9a364SKalle Valo static const struct file_operations rs_sta_dbgfs_scale_table_ops = {
26687ac9a364SKalle Valo .write = il4965_rs_sta_dbgfs_scale_table_write,
26697ac9a364SKalle Valo .read = il4965_rs_sta_dbgfs_scale_table_read,
26707ac9a364SKalle Valo .open = simple_open,
26717ac9a364SKalle Valo .llseek = default_llseek,
26727ac9a364SKalle Valo };
26737ac9a364SKalle Valo
26747ac9a364SKalle Valo static ssize_t
il4965_rs_sta_dbgfs_stats_table_read(struct file * file,char __user * user_buf,size_t count,loff_t * ppos)26757ac9a364SKalle Valo il4965_rs_sta_dbgfs_stats_table_read(struct file *file, char __user *user_buf,
26767ac9a364SKalle Valo size_t count, loff_t *ppos)
26777ac9a364SKalle Valo {
26787ac9a364SKalle Valo char *buff;
26797ac9a364SKalle Valo int desc = 0;
26807ac9a364SKalle Valo int i, j;
26817ac9a364SKalle Valo ssize_t ret;
26827ac9a364SKalle Valo
26837ac9a364SKalle Valo struct il_lq_sta *lq_sta = file->private_data;
26847ac9a364SKalle Valo
26857ac9a364SKalle Valo buff = kmalloc(1024, GFP_KERNEL);
26867ac9a364SKalle Valo if (!buff)
26877ac9a364SKalle Valo return -ENOMEM;
26887ac9a364SKalle Valo
26897ac9a364SKalle Valo for (i = 0; i < LQ_SIZE; i++) {
26907ac9a364SKalle Valo desc +=
26917ac9a364SKalle Valo sprintf(buff + desc,
26927ac9a364SKalle Valo "%s type=%d SGI=%d HT40=%d DUP=%d GF=%d\n"
26937ac9a364SKalle Valo "rate=0x%X\n", lq_sta->active_tbl == i ? "*" : "x",
26947ac9a364SKalle Valo lq_sta->lq_info[i].lq_type,
26957ac9a364SKalle Valo lq_sta->lq_info[i].is_SGI,
26967ac9a364SKalle Valo lq_sta->lq_info[i].is_ht40,
26977ac9a364SKalle Valo lq_sta->lq_info[i].is_dup, lq_sta->is_green,
26987ac9a364SKalle Valo lq_sta->lq_info[i].current_rate);
26997ac9a364SKalle Valo for (j = 0; j < RATE_COUNT; j++) {
27007ac9a364SKalle Valo desc +=
27017ac9a364SKalle Valo sprintf(buff + desc,
27027ac9a364SKalle Valo "counter=%d success=%d %%=%d\n",
27037ac9a364SKalle Valo lq_sta->lq_info[i].win[j].counter,
27047ac9a364SKalle Valo lq_sta->lq_info[i].win[j].success_counter,
27057ac9a364SKalle Valo lq_sta->lq_info[i].win[j].success_ratio);
27067ac9a364SKalle Valo }
27077ac9a364SKalle Valo }
27087ac9a364SKalle Valo ret = simple_read_from_buffer(user_buf, count, ppos, buff, desc);
27097ac9a364SKalle Valo kfree(buff);
27107ac9a364SKalle Valo return ret;
27117ac9a364SKalle Valo }
27127ac9a364SKalle Valo
27137ac9a364SKalle Valo static const struct file_operations rs_sta_dbgfs_stats_table_ops = {
27147ac9a364SKalle Valo .read = il4965_rs_sta_dbgfs_stats_table_read,
27157ac9a364SKalle Valo .open = simple_open,
27167ac9a364SKalle Valo .llseek = default_llseek,
27177ac9a364SKalle Valo };
27187ac9a364SKalle Valo
27197ac9a364SKalle Valo static ssize_t
il4965_rs_sta_dbgfs_rate_scale_data_read(struct file * file,char __user * user_buf,size_t count,loff_t * ppos)27207ac9a364SKalle Valo il4965_rs_sta_dbgfs_rate_scale_data_read(struct file *file,
27217ac9a364SKalle Valo char __user *user_buf, size_t count,
27227ac9a364SKalle Valo loff_t *ppos)
27237ac9a364SKalle Valo {
27247ac9a364SKalle Valo char buff[120];
27257ac9a364SKalle Valo int desc = 0;
27267ac9a364SKalle Valo struct il_lq_sta *lq_sta = file->private_data;
27277ac9a364SKalle Valo struct il_scale_tbl_info *tbl = &lq_sta->lq_info[lq_sta->active_tbl];
27287ac9a364SKalle Valo
27297ac9a364SKalle Valo if (is_Ht(tbl->lq_type))
27307ac9a364SKalle Valo desc +=
27317ac9a364SKalle Valo sprintf(buff + desc, "Bit Rate= %d Mb/s\n",
27327ac9a364SKalle Valo tbl->expected_tpt[lq_sta->last_txrate_idx]);
27337ac9a364SKalle Valo else
27347ac9a364SKalle Valo desc +=
27357ac9a364SKalle Valo sprintf(buff + desc, "Bit Rate= %d Mb/s\n",
27367ac9a364SKalle Valo il_rates[lq_sta->last_txrate_idx].ieee >> 1);
27377ac9a364SKalle Valo
27387ac9a364SKalle Valo return simple_read_from_buffer(user_buf, count, ppos, buff, desc);
27397ac9a364SKalle Valo }
27407ac9a364SKalle Valo
27417ac9a364SKalle Valo static const struct file_operations rs_sta_dbgfs_rate_scale_data_ops = {
27427ac9a364SKalle Valo .read = il4965_rs_sta_dbgfs_rate_scale_data_read,
27437ac9a364SKalle Valo .open = simple_open,
27447ac9a364SKalle Valo .llseek = default_llseek,
27457ac9a364SKalle Valo };
27467ac9a364SKalle Valo
27477ac9a364SKalle Valo static void
il4965_rs_add_debugfs(void * il,void * il_sta,struct dentry * dir)27487ac9a364SKalle Valo il4965_rs_add_debugfs(void *il, void *il_sta, struct dentry *dir)
27497ac9a364SKalle Valo {
27507ac9a364SKalle Valo struct il_lq_sta *lq_sta = il_sta;
2751ffb92649SGreg Kroah-Hartman
2752ffb92649SGreg Kroah-Hartman debugfs_create_file("rate_scale_table", 0600, dir, lq_sta,
2753ffb92649SGreg Kroah-Hartman &rs_sta_dbgfs_scale_table_ops);
27542ef00c53SJoe Perches debugfs_create_file("rate_stats_table", 0400, dir, lq_sta,
27557ac9a364SKalle Valo &rs_sta_dbgfs_stats_table_ops);
27562ef00c53SJoe Perches debugfs_create_file("rate_scale_data", 0400, dir, lq_sta,
27577ac9a364SKalle Valo &rs_sta_dbgfs_rate_scale_data_ops);
27582ef00c53SJoe Perches debugfs_create_u8("tx_agg_tid_enable", 0600, dir,
27597ac9a364SKalle Valo &lq_sta->tx_agg_tid_en);
27607ac9a364SKalle Valo }
27617ac9a364SKalle Valo #endif
27627ac9a364SKalle Valo
27637ac9a364SKalle Valo /*
27647ac9a364SKalle Valo * Initialization of rate scaling information is done by driver after
27657ac9a364SKalle Valo * the station is added. Since mac80211 calls this function before a
27667ac9a364SKalle Valo * station is added we ignore it.
27677ac9a364SKalle Valo */
27687ac9a364SKalle Valo static void
il4965_rs_rate_init_stub(void * il_r,struct ieee80211_supported_band * sband,struct cfg80211_chan_def * chandef,struct ieee80211_sta * sta,void * il_sta)27697ac9a364SKalle Valo il4965_rs_rate_init_stub(void *il_r, struct ieee80211_supported_band *sband,
27707ac9a364SKalle Valo struct cfg80211_chan_def *chandef,
27717ac9a364SKalle Valo struct ieee80211_sta *sta, void *il_sta)
27727ac9a364SKalle Valo {
27737ac9a364SKalle Valo }
27747ac9a364SKalle Valo
27757ac9a364SKalle Valo static const struct rate_control_ops rs_4965_ops = {
27767ac9a364SKalle Valo .name = IL4965_RS_NAME,
27777ac9a364SKalle Valo .tx_status = il4965_rs_tx_status,
27787ac9a364SKalle Valo .get_rate = il4965_rs_get_rate,
27797ac9a364SKalle Valo .rate_init = il4965_rs_rate_init_stub,
27807ac9a364SKalle Valo .alloc = il4965_rs_alloc,
27817ac9a364SKalle Valo .free = il4965_rs_free,
27827ac9a364SKalle Valo .alloc_sta = il4965_rs_alloc_sta,
27837ac9a364SKalle Valo .free_sta = il4965_rs_free_sta,
27847ac9a364SKalle Valo #ifdef CONFIG_MAC80211_DEBUGFS
27857ac9a364SKalle Valo .add_sta_debugfs = il4965_rs_add_debugfs,
27867ac9a364SKalle Valo #endif
27877ac9a364SKalle Valo };
27887ac9a364SKalle Valo
27897ac9a364SKalle Valo int
il4965_rate_control_register(void)27907ac9a364SKalle Valo il4965_rate_control_register(void)
27917ac9a364SKalle Valo {
27927ac9a364SKalle Valo return ieee80211_rate_control_register(&rs_4965_ops);
27937ac9a364SKalle Valo }
27947ac9a364SKalle Valo
27957ac9a364SKalle Valo void
il4965_rate_control_unregister(void)27967ac9a364SKalle Valo il4965_rate_control_unregister(void)
27977ac9a364SKalle Valo {
27987ac9a364SKalle Valo ieee80211_rate_control_unregister(&rs_4965_ops);
27997ac9a364SKalle Valo }
2800